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Instrument prices from Cox-Ross-Rubinstein tree



[Price,PriceTree] = crrprice(CRRTree,InstSet) computes stock option prices using a CRR binomial tree created with crrtree. All instruments contained in a financial instrument variable, InstSet, are priced.

crrprice handles instrument types: 'Asian', 'Barrier', 'Compound', 'CBond', 'Lookback', 'OptStock'. See instadd to construct defined types.


[Price,PriceTree] = crrprice(___,Options) adds an optional input argument for Options.


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Load the CRR tree and instruments from the data file deriv.mat. Price the barrier and lookback options contained in the instrument set.

load deriv.mat; 
CRRSubSet = instselect(CRRInstSet,'Type', ... 
{'Barrier', 'Lookback'}); 

Index Type    OptSpec Strike Settle         ExerciseDates  AmericanOpt BarrierSpec Barrier Rebate Name     Quantity
1     Barrier call    105    01-Jan-2003    01-Jan-2006    1           ui          102     0      Barrier1 1       
Index Type     OptSpec Strike Settle         ExerciseDates  AmericanOpt Name      Quantity
2     Lookback call    115    01-Jan-2003    01-Jan-2006    0           Lookback1 7       
3     Lookback call    115    01-Jan-2003    01-Jan-2007    0           Lookback2 9       

Price the barrier and lookback options.

[Price, PriceTree] = crrprice(CRRTree,CRRSubSet)
Price = 3×1


PriceTree = struct with fields:
    FinObj: 'BinPriceTree'
     PTree: {[3x1 double]  [3x2 double]  [3x3 double]  [3x4 double]  [3x5 double]}
      tObs: [0 1 2 3 4]
      dObs: [731582 731947 732313 732678 733043]

You can use treeviewer to see the prices of these three instruments along the price tree.

Input Arguments

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Stock price tree structure, specified by using crrtree.

Data Types: struct

Instrument variable containing a collection of NINST instruments, specified using instadd. Instruments are categorized by type; each type can have different data fields. The stored data field is a row vector or character vector for each instrument.

Data Types: struct

(Optional) Derivatives pricing options structure, created using derivset.

Data Types: struct

Output Arguments

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Price for each instrument, returned as a NINST-by-1 vector. The prices are computed by backward dynamic programming on the stock tree. If an instrument cannot be priced, a NaN is returned in that entry.

Related single-type pricing functions are:

Tree structure of instrument prices, returned as a MATLAB® structure of trees containing vectors of instrument prices and accrued interest, and a vector of observation times for each node. Within PriceTree:

  • PriceTree.PTree contains the clean prices.

  • PriceTree.tObs contains the observation times.

  • PriceTree.dObs contains the observation dates.

Version History

Introduced before R2006a