The share price for stock in H&H Imports, Inc. went up 290% between the close of market on Friday to the end of the day today. The reason for the move? Entertainer/investor 50 Cent, who owns a portion of the tiny company, tweeted all weekend about how enthusiastic he was about the company’s success. (He also appeared on CNBC.) By one calculation, 50 made $10 million with those tweets.