Editor's note: The following are questions received from listeners of "RealMoney Radio." To send Cramer a question about topics from his radio show, click here. Listen to Cramer's latest radio show by clicking here.Jim, is owning 50 stocks too many? -- Tony from Brooklyn Jim Cramer: I believe that for most investors, 50 stocks is way too many. The diversification benefit is minimal compared to say, 20 stocks, and it takes an awful lot of time to keep up with that many companies. If a company buys back stock, do you think that is a positive event? -- Vin from Staten Island Jim Cramer: A company buying back stock is generally considered to be a positive, especially if the share count is actually going down. Normally, companies buy back to stock in order to offset the addition of shares from executives selling company stock, so the share count doesn't always fall. Want more Cramer? Check out Jim's rules and commandments for investing from his latest book by clicking here.