WO2003107137A2 - Methods, systems and computer program products to facilitate the formation and trading of derivatives contracts - Google Patents
Methods, systems and computer program products to facilitate the formation and trading of derivatives contracts Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/06—Asset management; Financial planning or analysis
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/02—Banking, e.g. interest calculation or account maintenance
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/04—Trading; Exchange, e.g. stocks, commodities, derivatives or currency exchange
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/08—Insurance
Definitions
- This invention relates to methods, systems and computer programs to facilitate the formation trading and risk management of derivatives contracts on one or more underlying.
- Fig 1 gives an overview of the prefened embodiments of the invention
- Fig 2 describes the sequence of contractual agreements and cash flows m a BIC
- Fig 3 describes the format description of derivatives contract in the DCWBSOF format and how it is compressed m the DCWOF format
- Fig 4 describes the steps of the iterative decomposition process, how derivatives contracts and BICs arc itcratively combined to yield the price of the derivative contract
- Fig 5 describes an embodiment of the present invention in a pricing system
- Fig 6 shows a screenshot of an embodiment of the present invention implemented m an online pricing system wherein any user specify and name their derivatives contract payout payment function (paoff fimction) m a functional format as well as their BICs m a functional format and system parameters such as time and space increments
- any user specify and name their derivatives contract payout payment function (paoff fimction) m a functional format as well as their BICs m a functional format and system parameters such as time and space increments
- Fig 7 shows how BICs functional format is input m an HTML page
- Fig 8 shows how the derivatives contract m DCWBSOF or DCWOF is input m an HTML page
- Fig 9, 10,11,12 & 13 show an embodiment of the present invention m an exchange system
- the exchange trading system of Fig 9 comprises throe types of playois
- 1 contains an input interface 11 through which the price taker may describe a product of interest for pricing information 15 or put an order 16 on an identified product
- That input interface 11 may be a keyboard a mouse, a pad, a microphone or any sensor capable of understanding messages transmitted by human senses
- 1 also contains an output interface 12 that may be a screen, a speaker a printer, or any device transmitting signals decipherable by human senses and understandable by the human bra 1 also contains an authentication process 13 that uses various authentication algorithms to confirm the identity of the price taker prior to authorizing any operation with the exchange system
- the pricing information 15 as well as the order confirmation 17 or the trade confirmation 18 arc channeled through that output interface 12 to the price taker senses
- the price taker sends information relating to the product of interest as m 19 of Fig 1
- the product of interest is specified the form of a fimction f as / (5f S"', 5 S" L )
- the function / may be described a computing language that could be easily understood by price take
- 28 performs, if necessary, the transformation of relation (26) described in our detailed description that takes as input a fimction of unspecified parameters ⁇ t and ⁇ ⁇ as well as the Si 's and returns as output to 21, a function of solely thcSf 's. 21 further taking as input the most competitive basis instruments prices with the references of the market makers quoting them as provided by 22, uses the iterative decomposition algorithm of relations (20) to compute the price of the desired product which is then returned to 15.
- the basis instruments prices in 22 arc taken from individual market makers quoted basis instruments prices in 25 and 26 for example and by selecting the most competitive of each of the basis instruments with the references of the quoting market maker.
- the exchange system may operate as the counterparty in each transaction cither with the market makers or the price takers. In this instance, the exchange system would act as the guarantor of each obligation cither to the market makers or the price takers. It would then put in place a credit management fimction to hedge against the risk of default of any counterparty. This could be done through traditional means such as margin requirements or through credit derivatives by allowing basis instruments based on undcrlyings described in our detailed description to trade and by entering into contracts in which the credit risk is shifted to the most credit worthy players.
- the exchange system may also decide to let each party bear the credit risk of his or her counterparty and act solely as means of exchange, but then credit exposure management would be a very complex task for each and every counterparty to handle.
- Another critical feature of the exchange system for computational purposes is that when the number of possible states of the selected random variables grows large and the number future periods grows as well, the computational cost to price a derivatives contract becomes at least of the order of 0(s ' "" n ). So an actual system would include sonic dimension reduction variables transformations to reduce the number of variables on which the various derivatives contracts prices as well as the various basis instruments price depend. Also, in order to reduce the number of states, some actual algorithms would sample only some limited number of states to infer the price of larger combinations of basis instruments prices.
- model and model parameters 34 which are just 2 examples of systems operated by a potentially larger number of market makers, contain an input interface 35 as in 11 and an output interface 36 as in 12. It also contains an authentication process 37 for market makers as in 13 for price takers.
- Each market maker selects a model and model parameters 34 that can be processed in 31 to yield the market maker's quoted basis instrument prices that arc subsequently sent to 25.
- 34 is further detailed in Fig. 3 and shows that the model and model parameters description function is divided into a counterparty credit risk model 341, models of the stochastic process followed by the undcrlyings 342, models of the scaling density fimctions 343, and models for delimiting the range of basis instruments quoted 344 , all this combined as further defined in our detailed description to yield in 31 the quoted basis instruments prices.
- Assets and Trading Information Database 33 an inventory of the market maker's position in all basis instruments held. Trades Confirmation and settlement information from 24 are sent to the market makers through 32 where the information formatted for the output interface. All relevant information storing is done in 33.
- Fig 14. describes an embodiment of the present invention in a risk management system.
- the description of the risk management system is based on our decomposition of any derivative in basis instruments and our method for obtaining the implied conditional probability density functions from market basis instruments prices.
- the Risk Manager communicates with the Risk Management or Decision System 6 via an input interface 68 as 51in 5, 11 in 1 or 35 in 3 or 4, and an output system 67 as 52 in 5, 12 in 1 or 36 in 3 or 4.
- the Authentication Process in 65 is as 53 in 5, 13 in 1 or 37 in 3 or 4.
- the Risk Manager sends portfolio position requests to 66 which process them in 64, which then send a request to 63 to check the inventory of basis instruments positions held, another request may also be sent to 61 to obtain the market basis instruments prices.
- Fig 15 & Fig 16 show how an embodiment of the present invention enables Value At Risk (VAR) risk management.
- VAR Value At Risk
- Fig 17 shows how a portfolio managed in a VAR framework potentially exposes to potentially unbounded losses(yl) in likely scenarios ( state between xll and xl2) that may fall out of the confidence interval.
- an embodiment of our invention enables risk management in which a maximum worst case scenario loss can be ascertained with certainty by enabling precisely designed contracts to achieve that goal.
- Fig 18 shows how computer implemented methods may be used to reduce computational time in the specification of BICs and the resulting derivatives price computation.
- Fig 19 shows how computer implemented methods may be used to reduce computational time in the specification of derivative contracts and the resulting derivatives price computation.
- the present invention introduces the notion of basis instruments as the building blocs for pricing or hedging any derivative security defined in the most general sense. It describes a decomposition formula that precisely shows how any derivative security is decomposed in these basis instruments. The importance of these basis instruments tools cannot be overemphasized. A top-level understanding of their relevance may start by asking the two following questions with no apparent bearing on the issue at hand:
- our identification of the basis instruments and the characteristics of each one of them can be likened to the identification of the gene as the unit clement in the expression of each living being descriptive feature as well as the inventory of all possible genes.
- the analogy is the atom and the inventory of all atoms given by the Mendclcicv table.
- Our decomposition formula is analogous to describing the genetic composition of each possible living being, once identified; in physics or chemistry, our decomposition formula could be equivalent to providing the atomic composition of each described material, whether solid, liquid or gas.
- Arrow and Dcbrcu defined what arc now called Arrow-Dobrcu primitive securities (and Arrow-Dcbrcu state prices) as the basis elements in which all other contingent claims could be decomposed into in a single security, single future period market (but with multiple possible states).
- Arrow Dcbrcu securities arc simply securities that pay $1 at the end of the period if a given state occurs and nothing if any other state occurs. If there is one Arrow-Dcbrcu security for all possible future states, then a claim contingent on future states can be decomposed into such securities. To sec how this happens, one can observe that if f is a function defined on ⁇ , set of all possible states the variables S can take, wc have the trivial identity:
- 1- j s-, ⁇ represents the function taking the value 1 if S is equal to s and the value 0 if S is equal to any other value.
- identity (1) demonstrates the Arrow-Dcbrcu result that any contingent claim, which can always be described by a function /, can be obtained as a sum of f(s) securities paying 1 at time to if _-> ⁇ . is equal to a particular value s and zero if any other value is taken, with s spanning the whole range of value S may possibly take at time t 0 .
- Black, Scholcs (Nobel prize 1997) and Morton (Nobel prize 1997) made the assumption that the dynamic of securities followed a pattern similar to that of a stochastic process called a geometric Brownian motion with a constant parameter called the volatility. They thus derived what is nowadays known as the Black-Scholcs-Mcrton formula. What made this model appealing was that if its assumption held, the basis instrument from which to replicate any contingent claim on an underlying would be the underlying itself. Black.
- Formula (6) shows that a portfolio consisting of a long position m the derivative contract whose value is equal to f(S t ) at any time t coupled with a short position in ⁇ units of the imderlymg is solely a fimction of time, thus risk-free Thus it should earn the risk- free rate of return rj,(t) So if one writes
- vanilla options Call/Puts
- This model while having theoretical appeal, has not been validated by empirical tests ([24]).
- practitioners price path dependent options with concerns for the Vega-convexity due to the stochas- ticity /uncertainty of volatility in a manner that cannot be reflected in Dupire & al, ([25])).
- FAS 133 requires that derivatives be accoimtcd as hedges and their profit and loss (P&L) reported in the Other Comprehensive Income (OCI) section of financial statements only when it can be shown that this P&L offsets that of an existing underlying in at least 80% of the risk of fluctuations in the value of this underlying. This creates potential confusion as to how to estimate this 80% value among the wide choice of possible models.
- Patents applications WO 02/44847 A2 or US 2002/0107774 Al are one of the many model dependent approaches to address the issue. The existence of a market for basis instruments would conclusively address this issue.
- all those models, by assuming continuous-time processes arc only approximations to physically realizable phenomena, due to the existence of transaction costs.
- the current approach for managing the risk of a portfolio of derivatives is by hedging the Greeks of the portfolio
- the Greeks arc the sensitivities of the portfolio to different market variables
- Delta is the sensitivity with respect to variations in the asset price
- Gamma is the sensitivity of the Delta to variations in the asset price
- Vega is the sensitivity of the portfolio to variations m its Black Scholcs-Mcrton implied volatility
- Theta is the sensitivity to time
- hedging strategies arc aimed at matching first and second order derivatives of portfolios to the various parameters In doing so, what is implicitly assumed is that the sensitivity of portfolios of derivatives to their parameteis is polynomial and of degree 2 or 3 or 4 for the most accurate hedges
- a haws instr ument would be an agreement at time to to buy at time t k -i (1 ⁇ k ⁇ n) a lottery ticket at the price $10, 000 ⁇ r/, — 1 A _I, where _ ! vt a k-1 series of 1 a d 2 indicating the tates of winning or losing lottery tick ets bought between time t and time rj _ ⁇
- Wc call X t the stochastic process taking the value 1 the day after the end of each game won by the NY Yankees (AL) and the value 0 otherwise
- X t is for t being a day after a game a bet that the Yankee will wm the game of the day before State 1 that AL wins the World Scries is thus such that
- Wc suppose each team has a 60% vs. 40% probability of winning its first match in its home stadium and that this probability is increased by 10% after each game won if the next game is at home and it decreases by 10% after each game lost at home if the next game is also at home. Wc also assume that once a party wins 4 games, its probability of winning the remaining games if any is zero.
- ⁇ shall pay ⁇ the amount N(X tl , ...,X t1 _ l ) ⁇ 8> ⁇ B _ 1 (X il . ..., X t ⁇ _ ⁇ ) and at time -clock ⁇ shall pay ⁇ the quantity : N(X tl , .... y.,_. ) x -X ⁇
- vanilla options and Arrow-Dcbrcu primitive securities coincide, when the number of states increases, the two types of contracts become different, yet the two. with bonds and forwards added to options, remain equivalent through a bijcctive transformation.
- Wc choose to present our basis instruments below as extensions on vanilla European options forwards and cash instruments instead of the academic Arrow-Dcbrcu securities as this basis, is more economically sensible and computationally allows a faster convergence to the desired payoff for most derivatives instruments using the lower order basis instruments and making the decomposition around the forward value around which probabilities of occurrences arc clustered. This is also of critical importance to relate to the shortcomings of the Black Scholcs Morton derivatives hedging approach.
- Formula (14) shows that at any trading time, a derivatives position would be hedged through cash and underlying or forwards in amounts equal to the sensitivity of the option to its underlying (or delta), but unlike Morton, there arc complementary terms representing a spanning of calls and put options in proportions equal to the second derivative (or gamma) of the financial derivative with respect to the underlying.
- Formulas resembling (14) have boon l ⁇ iown before in a two period case, (sec for example [16], appendix), however these formulas have been presented with two important limitations solved in our derivation:
- Wc suppose we arc in an m+l assets economy, with n+l trading periods t 0 ⁇ -,_ ⁇ ⁇ t n ... ⁇ t n chosen as scon appropriate.
- S c taken by convention to be So is the base currency asset and thus merely represents the mit of cash in the reference currency and S 1 , ..., S" 1 arc risky under lyings whose values in units of So vary across time; so, the default unit of any given number or quantity is o and when there is no ambiguity, So is simply one.
- n represents the m+l undcrlyings economy between to and t rl .
- e 0> represents an exchange system of contracts whoso values is dependent on the realization of the m+l undcrlyings of economy Eo,, L between to and t n .
- j refers to the value of the underlying S' at time t 3 .
- S ⁇ l refers to the realized value of the underlying St. at time t 3 as opposed to the abstract reference to the parameter value symbolized by Sj.
- F j is an arbitrarily chosen value of the underlying S 1 at time t In general for the developments to be made hero, this value will tend to be the forward value for the maturity i, at time t,-_ ⁇ , or the value of S' j .
- J f(x)dx is by definition equal to: ⁇ f(x t ) x (x, +1 — -s.) and ⁇
- (a.,) is by definition equal to f( ⁇ +l) ⁇ ⁇ (j: ' ) ; ,. may ⁇ 0 be equal to the infinity and will be truncated to a finite number only upon proof that the remaining terms are negligible within the approximation bounds sought.
- Ix will tend to represent the actual range of values an underlying can take or any bijcctive transformation of this range. Since increments of an underlying value for all types of undcrlyings to be considered are discrete (that is there is a minimum increment value called the basis point), the cardinal of Jj, is always finite or denumcrablc ; h b
- J f(x)dx may also be formally noted as f f(x)dx ⁇ JS .
- - ⁇ _ (x%) may also be formally noted as f (x ⁇ )l ⁇ -- F° r any x £ I ⁇ , a there exists a j ⁇ n
- - is by definition ⁇ 3 , if j 0 r_ is by definition x.
- a Basis instrument Contract (BIC) is a contract and involves and identifies two parties named buyer ⁇ and seller ⁇
- the contract expiry date also known as maturity t 3 with t j > t ⁇ , which is the date at which the party identified in the contract as the seller ⁇ complies with its part of the agreement by paying the buyer ⁇ an amount m units of basis currency defined as one of the generic form further detailed below
- a basis instrument B ta ⁇ t ⁇ t t ( ⁇ ⁇ , N (» ⁇ , tk) Si (-.1 . , j p )) is a security contract entered into at time t 0 between a buyer ⁇ and a seller ⁇ stipulating that
- ⁇ shall pay ⁇ a premium payment amount such as
- EOPBICP N (Si; ••• , S ® S ,*. ((*!> • - ⁇ , ⁇
- the EOPBICP is used here to facilitate teaching of the present invention.
- Other payout formats can be used to create a BIC-Basis.
- Such format may include Extended Arrow-Dcbrcu Format Basis Instrument Contract Payout or EADF- BICP, the Extended Fourier Transform Format Basis Instrument Contract Payout or EFTFBICP, the Extended Hcrmitc Polynomial Format Basis Instrument Contract Payout or EHPPBICP. All those format arc equivalent and from a complete set of one kind, a complete sot of the other kind can be obtained through a linear transformation. In a preferred embodiment of the present invention a few examples of the linear transformation are disclosed in a matricidal form.
- the scaling density function translates how the offer and demand for each basis instnmient in turn affects the level of prices. This phenomenon is also known in securities markets as slippage. For 0 ⁇ p ⁇ k+ 1, K p is a priori a function of
- N (5*. ; ⁇ ⁇ ,S tz ) is called the notional of the contract.
- ⁇ is a stcpwise increasing fimction, — ⁇ (—N) — ⁇ (N) > 0 and is called the bid/offer spread.
- ⁇ is a stcpwise increasing fimction, — ⁇ (—N) — ⁇ (N) > 0 and is called the bid/offer spread.
- ⁇ is a stcpwise increasing fimction, — ⁇ (—N) — ⁇ (N) > 0 and is called the bid/offer spread.
- 5,794,207 proposes an electronic means of matching buyers' bids and sellers' offers, but outside the scope of an electronic derivatives exchange which requires the traditional hedging or replicating portfolio approach and without explaining the nature of the economic price equilibria achieved through such a market process.
- U.S. Pat. No. 5,845,266 and U.S. Pat. No. 6,098,051 implement order-matching and limit order book algorithms, which can be and are effectively employed in traditional "brick and mortar" exchanges.
- Their electronic implementation however, primarily serves to save on transportation and telecommunication charges. No fundamental change is contemplated to market structure for which an electronic network may be essential.
- a preferred embodiment of the present invention is to provide through the scaling density functions a functional format that reduces the size of the data to be supplied to the system and in effect eliminates the need for a trader to continually update their bids and/or offer responsive to demand.
- the scaling density function has been provided for all basis instruments contracts, there is no need for further trader intervention and the trader or market maker knows very precisely for each quantity transacted at which price the transaction concluded.
- the premium is expressed as a fimction of the values of the fluctuating variables between time to and time . Enabling this extension is what makes possible the most critical sections of this invention.
- the payment at time t j is expressed as units of a specific basis set of fimctions of the fluctuating variables at time t j with scaling units being- functions of the fluctuating variables between time to and time .
- the choice of the specific fimctions is made so that the selected basis set is a mathematical basis of the vcctorial space of functions of the fluctuating variables at time t with the scalar units belonging to the set of values (i.e. ) taken by functions of the fluctuating variables between time to and time tj.
- any other basis would be equivalent to that one.
- the claimed scope of the invention is not intended to be limited to the specific choice made herein for illustrative purposes, but rather to encompass its possible equivalent.
- the basis is selected to be as "close” as possible to known instruments actually traded in the markets, that is bonds, forwards/futures and European vanilla calls or puts.
- the notion of "close” is meant in particular in the sense that if the scalar set becomes the field of real numbers, as happens at tj , then wc would recover classical bonds, forwards/futures and European vanilla calls or puts.
- Wc show here an example of how to move between EOFBICP format, EADBICP format or EFTFBICP format.
- the components of B and Pa in the representation above are m-l dimensional matrices.
- a simple transform may help by decomposing in the basis instruments and treating the case of moments or baskets separately.
- Wc can define with the coefficients ofthe interpolation A m , k e [l.n],rn e [l,n] a square matrix A of dimension ' ri.
- Input consists of the vectors M[l..n] and EX[l..n]; the vector p[l..n] is output.
- Vfc e [0, r ⁇ - 1], ⁇ fc e Q
- N lcmj ⁇ - e [o, n _ ⁇ ](iVj.) where 1cm is the least common multiple.
- a preferred embodiment of the present invention solves one issue that must be addressed in the determination of basis instruments price.
- the problem is that basis instruments prices fluctuations in response to offer and demand sensitivities must be such that no arbitrage opportimity is created. This is tested by making sure that state prices are positive and the sum of implied probabilities of all states is one.
- a weighting function may be defined as
- weighting functions may be used to simply define scaling density functions of basis instruments by first transforming the input weighting fimctions into conditional state-prices vector and then, using after multiplication by a matrix T, the vector of basis instruments prices responsive to inventory, offer and demand for each basis instrument.
- Another embodiment of the present invention is its ability to include most accurately credit risk sensitivities in the pricing risk management and trading of financial derivatives.
- the ratios 'j "1 may be taken to be independent from one another, the
- beta distribution may depend upon the realized value of other inputs, where said other inputs may include different undcrlymgs
- the credit risk limit of a given counterparty can inferred by setting a maximu-tn responsive to the difference between the value of the counterparty liability not inclusive of credit risk and the value of said liability inclusive of credit risk 4
- Wc define as ⁇ ' . ,. (/) 2 a so-called derivative security representing a contract entered into at time t 0 and paying / Si , ⁇ ⁇ ⁇ , S ⁇ ' ⁇ - ⁇ , S 1 ⁇ ⁇ ⁇ , S/'A units of underlying currency S c at time tn in exchange for the payment of a premium at time i,.
- This more general definition includes but is not limited to the one in FAS 133 pp3-7, paragraph 6- 11 and its 10(b) amendment in FAS 138.
- a derivatives contract defined with its payout payment function in the / ( i 1 , • • • , S ⁇ • • • , S ⁇ ⁇ ⁇ , S, ) format is called a Derivatives Contract Without Optional Features or DCWOF.
- IP (/) (Si; • • • ; S n ) f ( ⁇ ? ⁇ ; • • • i S n ) the price at time tn of the security contract entered into at time to and guaranteeing receipt of / (S ⁇ ; • • • ; S tract) ⁇ / (Sj, • • • , Sf, • • • • , S 1 • • • • , S,'[ L ) units of underlying currency Sc at time tn. 11 ⁇ i ti (/) is the trivially associated contract.
- wc define as ug tmony (/) (S ; - - - ; S,.) the price at time t t of the sccmity contract entered into at time to and guaranteeing receipt of / (S ⁇ , - ⁇ ⁇ , S ⁇ ' ⁇ ⁇ ⁇ . S* • • • • . S" 1 ) units of underlying currency Sc at time tn; II Q ⁇ .. (/) is the associated contract.
- any derivative security --I j , endeavour (/) representing a contract entered into at time to and paying / ( j , • • • , S ⁇ ⁇ • • , Si ⁇ ⁇ ⁇ , S'') at time t n for a premium paid at time t t can be decomposed as a sum of basis securities as:
- the first components in formula (18) are what wc call zeroth order basis instruments on the basis currency and arc or extend what is known as zero coupon bonds m a single future period case
- Second order basis instruments are extensions on what is known as correlation options on two sources of uncertainty in a single future period case
- n-th order basis instruments involve contingencies on n sources of uncertainty
- the method of the present invention is merely used for pricing purpose however, it may be advantageous to use a basis sot that makes the best use of the more directly available information
- the most directly available information is the conditional density and the associated basis set is the Arrow-Dcbrcu state-prices
- Wc will further detail how the formula works on a vanilla option example Wc will consider the case of a single underlying Sj ⁇ S f and the reference currency is S? ⁇ 1
- the formula above reduces to ⁇ _ lA ) X d ⁇ °o l+1 (s 0 , , S 3 , F, +1 )
- the derivatives of interest here is given as a vanilla call option contracted at time t 0 and maturing at time t a Wc assume there is no interest rate and that the rcpo or dividend rate is zero There is no slippage and there is no credit risk, but there arc n+ltrachng periods t 0 , ⁇ , t n Wc also assume that first order basis instruments prices arc given by the Black Scholcs formula KN( ⁇ d 0 ))
- Our invention in one of its simplest embodiments teaches a solution to this acknowledged problem.
- Other embodiments solve the problem under even more complex constraints.
- constraints include accounting for microstructural issues, hedging strategics, etc.
- This method of our invention further enables an easily reproducible, broadly applicable and computer implementable sequence to solve the problem. Further still, our invention enables and teaches even more advanced hedging strategics and other more sophisticated systems such as exchange systems for any types of derivatives.
- Theorem 2 Let's suppose we arc in a market exchange system r-o, note where all possible basis instruments trade. Let's also suppose there are no arbitrage opportunities.
- ⁇ j is the m+l- dimensional vector of parameters choices given to the seller ⁇ (resp. ⁇ ) at time t j .
- ⁇ j the conditional expectations of f for any time in the future as a function of ⁇ j ( ⁇ j 0 ⁇ j ⁇ n can be reduced to be functions with a maximum (resp. minimum) in the subset 3? ⁇ ' +1 (resp. S ⁇ -n 1"1 ) of possible values of ⁇ l (resp. ⁇ ( ) 0 ⁇ j ⁇ n.
- I-t ⁇ .iller (/) can be reduced to a contract that pays a function f (S 0 ; ⁇ ⁇ - ; S n ) at time t n .
- ⁇ . ArgMax ⁇ g jX ⁇ character (-/) (S 0 ; A; ⁇ 0 ; • • • ; S.; /?,; ⁇ .; S l4 . ⁇ ;/? t+1 ; ⁇ l+ ⁇ ; • • • ; S radical; ⁇ a ; ⁇ tile)
- ft ArgMax U ⁇ . resort (/) (S 0 ; ⁇ 0 ; ⁇ 0 ; ⁇ ;S l ; ⁇ ,; ⁇ ,; S l+1 ; ft +1 ; ⁇ l+1 ; • • • ; S neutral; ft.; ⁇ tile) ⁇ , €-& ⁇ so that ft is a fimction of o; ⁇ o; ⁇ 0 ; • • • ; S ⁇ .
- Section 5.5 further illustrates how this practical simplification is done on the most common examples.
- An American (or Bermudan) option here is defined here as the contract guaranteeing to the buyer the right to purchase (for a call) or sell (for a put) the underlying S at the strike price K at any time between t and t a .
- the payoff at maturity t n can therefore be written in a functional form as :
- a passport option is a contract giving the right to the buyer to buy or sell at anytime between io and t n - 1 a maximum of N units of underlying S; if at time tn the sum of those trades generate a profit the buyer keeps it, if a loss is incurred, the seller pays for it.
- the payoff at maturity trise can therefore be written in a functional form as:
- ft as a function of any of the ft's is twice continuously diffcrentiable except at most at one point.
- the passport with m undcrlyings is a contract giving the right to the buyer to buy or sell at anytime between to and iggi_ ⁇ a maximum of N units of underlying of each of the undcrlyings S J ; if at time t n the sum of those trades generate a profit the buyer keeps it, if a loss is incurred, the seller pays for it.
- the payoff at maturity - clause is:
- a Moving Window Asian option with early exercise is a contract in which the buyer may choose to receive at any time after the contract date to and the maturity t n , the difference between the average of the underlying S over the last p trading periods and the strike K if this difference is positive.
- the payoff at maturity tn can therefore be written in a functional form as: ft (-5(6- 1 - K ⁇ )) + ® ⁇ ° consult + (1 - ft)ft ( ⁇ (S 2 - 1 ⁇ 2)) + ® Bl ⁇ tl ⁇
- N f (SQ; ⁇ o ; ⁇ 0 ; • • • ; S rl ; ⁇ a ; ⁇ tile) — x + . . . + (1 - ft) . . . (1 - A--2)A--1 ( ⁇ (S n -! - Kn-l)) + ® £°-i, n
- the methods of the present invention compare to those of PDEs Trees or MontcCarlo and many of the speed improvement methods of regular integral may be advantageously integrated m this framework, such methods would include Simpson types of methods, Gaussian quadratures and related methods importance sampling methods, low discrepancy methods on Sobol, Halt ⁇ n or other family of points
- risk management systems include
- VAR(i, i + j) - Min ⁇ s > O such that (-5(1 , , )) ⁇ -v- ⁇ (-, j) ⁇
- the main drawback of the value at risk method that is resolved in another preferred embodiment of the present invention is the possibility to concentrate or hide excessively negative payoffs in states where the potential loss exceeds the computed value at risk amount.
- Fig 7 shows a better illustration of this problem.
- a custom portfolio payoff may be designed to provide a maximum possible loss for all possible cases. The method may them be implemented in risk management systems or risk management computer program products.
- the method may them be implemented in risk management systems or risk management computer program products.
- derivatives accounting responsive to FAS 133 or IAS 39 is facilitated by removing uncertainty that comes with assuming a particular model to allocate profit or losses on derivatives as hedging instrument and hence their allocation an Other Comprehensive Income category. As such it is more effective than the methods disclosed in WO 02/44847 A2: Dynamic rcallocation hedge accounting,
- the computational time is a major concern. It may appear at first computationally intractable to implement a full-dcpendancc for the price of the option of all the So S n because otherwise the algorithm computation time grows exponentially with the number of time increments.
- the purpose of the algorithm is so to decrease the complexity of the option price dependence. It can be easily accomplished for non-path-dcpendant options and undcrlyings following a martingale, hence markovian process ( process driven by brownian motions or more generally Levy processes).
- markovian process process driven by brownian motions or more generally Levy processes.
- the price of an European Vanilla (under geometric brownian motion assumptions) at time i only depends of the curcnt value of the underlying S . and not on its past values.
- wc consider the price of the option as a function of several variables VX- one will be the current value of the underlying and the other variables will bo used to compress the path-information needed to determine the price of the option at any time.
- VX- one will be the current value of the underlying and the other variables will bo used to compress the path-information needed to determine the price of the option at any time.
- Wc define the payoff function as a fimction of the vector: f n (V) — V t .
- wc first compute with our algorithm the price of the corresponding European option that gives the price of the European option at any time for any spot equal to the past values of the underlying which is exactly what wc need to compute the algorithm for the American Option.
- computational gains may be achieved by the following process: 1. define / in discrete space 2. extend / in the continuous space with an infinitely smooth or analytic fimction fc that interpolate the values of / in the discrete space
- Wc establish the proof in a discrete setting in order to avoid making regularity assimiptions that may end up not being true for cases of interest and to match real world discreteness.
- These cases of interest include the most common derivatives pay-off structures (ST — K) + that is a fimction of S that is not twice diffcrentiable in that variable.
- Wc also introduce the operator of composition 0 of thc ⁇ 5,-- , ⁇ ' t , ⁇ , 's as:
Abstract
Description
Claims
Priority Applications (4)
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AU2003243629A AU2003243629A1 (en) | 2002-06-18 | 2003-06-18 | Methods, systems and computer program products to facilitate the formation and trading of derivatives contracts |
EP03760448A EP1856590A4 (en) | 2002-06-18 | 2003-06-18 | Methods, systems and computer program products to facilitate the formation and trading of derivatives contracts |
US10/518,823 US7933824B2 (en) | 2002-06-18 | 2003-06-18 | Methods, systems and computer program products to facilitate the pricing, risk management and trading of derivatives contracts |
US13/093,686 US20140214718A1 (en) | 2002-06-18 | 2011-04-25 | Methods, systems and computer program products to facilitate the hedging, risk management and trading of derivatives contracts |
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US38973002P | 2002-06-18 | 2002-06-18 | |
US60/389,730 | 2002-06-18 |
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US10/518,823 A-371-Of-International US7933824B2 (en) | 2002-06-18 | 2003-06-18 | Methods, systems and computer program products to facilitate the pricing, risk management and trading of derivatives contracts |
US13/093,686 Division US20140214718A1 (en) | 2002-06-18 | 2011-04-25 | Methods, systems and computer program products to facilitate the hedging, risk management and trading of derivatives contracts |
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US (2) | US7933824B2 (en) |
EP (1) | EP1856590A4 (en) |
CN (1) | CN1675643A (en) |
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US20070162373A1 (en) | 2007-07-12 |
WO2003107137A3 (en) | 2004-03-18 |
US20140214718A1 (en) | 2014-07-31 |
US7933824B2 (en) | 2011-04-26 |
AU2003243629A8 (en) | 2003-12-31 |
EP1856590A2 (en) | 2007-11-21 |
EP1856590A4 (en) | 2007-11-21 |
CN1675643A (en) | 2005-09-28 |
AU2003243629A1 (en) | 2003-12-31 |
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