Shares of Yelp (YELP) have been surging 9% in reaction to its earnings report. Yelp impressed investors even though it lost 8-cents a share; consensus was for minus 6-cents. Key here were better-than-expected revenues. They rose 68% from a year ago. Yelp is also improving its outlook for the year citing success with display ads on mobile phones-- something it seems to have in common with Facebook. Shares are now up more than 35% since the start of the year.

Next is Energizer (ENR), the parent company of Schick razors and related products. The stock has been trading lower despite beating estimates with its earnings, posting $1.35 a share on $1.1 billion in revenue. The problem here: the company claims its sales are hurting because rival Proctor and Gamble (PG) has been bombarding customers with promotions on its Gilette products. By the Church and Dwight (CHD), the maker of Arm and Hammer says PG has been pulling similar stunts in the laundry aisle. But Church and Dwight is out with

Sell in May and Go Away! Is it good advice or not? Yahoo! Finance's "Hot Stock Minute" host Lauren Lyster talks with Yahoo! Finance Senior Columnist Mike Santoli who just wrote an article on the concept. The two also talk about the Federal reserve Bank's latest guidance on the future of its bond buying efforts at quantitative easing as well as the European Central Bank's decision to cut interest rates.