Holding cost? This is under the assumption that there is no arbitrage, that is to say, we don't consider the interest of the occupied funds, otherwise there will be a spread between the margin of the futures contract (with a small change) and the premium of the option contract (with a large change), so we should consider this difference when calculating the option value, and the calculation will be correspondingly more complicated.

These terms are difficult to translate, because Chinese expressions have never been unified, so it is enough to know the exact meaning of English expressions.

I'm not sure if that's what you're talking about. I'll know if you make a context.