It is preferrable to Disclose/filing of profit/ loss from speculation transactaction in your case. Since in such cases many times Income tax department recieves data from Exchange or other sources regarding such transactions in F & O/Share Trading trasnaction, in that event if you would have already reported these transactions in your IT Return, it will be cross verified in records of income tax that you have reported the same and there will be no problem. Otherwise, if they found that you have not reported, they may send you notice that you have done such transacitons in shares/Fd & O and have not reported the same. Hence, reporting is preferable to prevent from hassle of replying to Income Tax notices at later stages.
Additionally as mentioned by Kiyosh, it would be beneficial to you to claim losses in current year and set off it from income in next year if you have incurred losses in current year.