Short Term Capital loss can not be set-off against salary income for the year. It can only be set-off against any capital gain i.e. Long-Term or Short Term for the year.
Thus,Short-Term capital loss of listed securities can be set-off against Long-term Gain in unlisted securities. However, Long-Term capital loss can not be set-off against Short Term Capital Gain. It can only be set-off against Long term capital gain only. (Refer Sec 70 & 71)
Derivative loss is either Short-Term capital loss or Business loss depending upon nature of your activity i.e. investing activity or business activity. If it is out of your investing activity, derivative loss is a short term capital loss and it can be set-off against short term capital gain in shares
I have incurred a short term capital loss on sale of Listed Shares (STT Paid) in F Y 2008-09. Can I adjust / set off this loss STCL against Long Term Capital Gain on sale of Property in the same F.Y. 2008-09