Interpreting Option Greeks in VeighNa OptionMaster
Summary
A VeighNa user investigates why a near-the-money copper futures call displays a delta above two, comparing it with a soybean meal option. The discussion traces the discrepancy to a change in OptionMaster’s Greek conventions across versions. Earlier versions displayed cash Greeks, while later versions calculate theoretical Greeks and scale them for the contract size before presenting them. This explains how a displayed delta can exceed the usual theoretical delta range without implying that the pricing model itself is wrong.
The note also distinguishes European Black-76 pricing from an American binomial-tree model and describes checking contract multipliers, underlying price units, and volatility inputs when a Greek looks implausible. The author reports that the displayed value is consistent with multiplying theoretical delta by the copper option’s contract size, and notes that this scaled position Greek can be used in hedge calculations. The exchange is a forum troubleshooting discussion, not an independent validation of the implementation; it gives no complete code review or broad numerical tests.
Key ideas
- Theoretical delta measures option-price sensitivity to a one-unit move in the underlying, while cash or scaled Greeks express exposure in a different unit.
- OptionMaster versions changed how Greeks are calculated and displayed, so users should check the version’s conventions.
- The displayed delta can exceed one when theoretical delta is multiplied by the contract size.
- Contract multipliers, price units, volatility, and model choice are useful checks when a Greek seems inconsistent.
- Scaled position Greeks can support hedge sizing when the exposure and hedge instrument use compatible units.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.