bingbingliang

The delta of a call can range from 0.00 to 1.00; the delta of a put can range from 0.00 to –1.00. Long calls have positive delta; short calls have negative delta. Long puts have negative delta; short puts have positive delta.

Long calls and long puts both always have positive gamma. Short calls and short puts both always have negative gamma.

bingbingliang

I check CFA text, I 'm with CFA text opinion, Stock up, call up, delta >0 and increase, but short call has negative value