Stock market investment can be good one for someone and might be risky for others who doesn’t have ample knowledge of it.Once should do a complete market research before buying any stocks or shares with the hard earned money.People who are investing their money in stock market should always remember to purchase "A" group of shares or stocks which will give you high returns.Investing on such shares are less risky compared to other group of shares. Once you feel that the stock or share which you have purchased has gained good returns, request you to please withdraw or sell that stock and don’t be greedy.