I don't think it makes sense to invest in an FD since. 1.) A 30 day FD is not very likely to give you 8-9% 2.) Inflation is so high in India that your losing money even though you think that you are doing well enough.
I would suggest you to expect a larger return and try hedging your portfolio correctly. For example you can buy a stock which is likely to go higher, and to limit your risks, you can buy a put option on the same stock, so even if the price falls drastically, you can exercise your option and not lose anything except for the premium you paid.
Good luck!:)