burnsy562000

If you are talking about Options (Derivative) - Call/Put...

See if this helps

Put-Call Parity

P+S = C + X/(1+r)^t

Therefore,
P = C + X/(1+r)^t - S
and
C = P + S - X/(1+r)^t

If interest rates rise, the X/(1+r)^t component decreases...
i.e. 10/1.10 = 9.09 vs
10/1.20 = 8.33

For Puts, if interest rates increase, your X/(1+r)^t is lower, and therefore you are adding less to the Put value. If rates decrease, your X/(1+r)^t value is higher, and therefore adding more to your Put value.

For Calls, if rates increase, your X/(1+r)^t component decreases, which turns out to be a lower negative for the Call function, and therefore, a higher Call value. If rates decrease, your X/(1+r)^t is higher, therefore reducing the Call value...]

I hope i didn't confuse you.... or my self.