### Highlights fromVisualize dynamic hedging

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# Visualize dynamic hedging

28 Jan 2008 (Updated 29 Jan 2008)

(via an interactive GUI)

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Description

Function HEDGEDEMO aims to help students and instructors of finance visualize trading demands of simple static or dynamic value-hedging strategies. In a single-factor setting, 2-asset hedge portfolios are constructed to match, at a point in time, value and delta of the hedged portfolio, consisting of 1-2 assets, one unit of each. (Delta is estimated by shifting the factor path by +/- 0.01). Factor dynamics are described by a Matlab expression or function that defines vector 'X' in terms of vector 'T', where T = StartDate:EndDate. With 'X' defined and evaluated, paths of asset prices are similarly given by Matlab expressions or functions inputting 'X' and 'T'.

Required Products Financial Toolbox
MATLAB release MATLAB 7.4 (R2007a)
Other requirements Built-in examples/defaults call functions of Financial Toolbox; these can be replaced with arbitrary alternatives.
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23 Aug 2011
30 Jan 2008

Ouch :( Thank you for the report, Olivier, I'll look into this. The singularity warning, however, may be legitimate: we find the quantities by solving Aq = b, where A packs prices and deltas, and A can have short rank.

30 Jan 2008

Hi,
I got an error when pressing Go, after having generated the time series :
"
??? Index exceeds matrix dimensions.

Error in ==> hedgedemo>changeHedgeAssetSeries/changeHedgeValueSeries at 411

Error in ==> hedgedemo>changeHedgeAssetSeries at 370
changeHedgeValueSeries

Error in ==> hedgedemo>fillFrame41/addFreqPanel/constructHedge at 184
changeHedgeAssetSeries

??? Error while evaluating uicontrol Callback
"

and sometimes
"
Warning: Matrix is singular, close to singular or badly scaled.
Results may be inaccurate. RCOND = NaN.
> In hedgedemo>changeHedgeAssetSeries/changeHedgeQuantSeries at 379
In hedgedemo>changeHedgeAssetSeries at 369
??? Index exceeds matrix dimensions.
"

It does that, even when using inputs displayed on the jpg example.
Do you have an idea ?