The short interest data is out using the April 30 settlement date.  We have seen some drastic changes from the April 13 settlement date in many issues, followed by some surprises where the short sellers seemed to be absent in other cult stocks and controversial stocks.  Earnings season may have greatly influenced the short selling ambitions and the most recent choppiness and selling in the markets may show more changes ahead.

24/7 Wall St. screened out selective short interest data with the latest changes from the settlement date of April 30, 2012 versus the prior April 13, 2012 in shares of the following: Alcatel Lucent S.A. (NYSE: ALU); Banco Santander, S.A. (NYSE: STD); Bank of America Corporation (NYSE: BAC); Barnes & Noble, Inc. (NYSE: BKS); Dendreon Corporation (NASDAQ: DNDN); Diamond Foods, Inc. (NASDAQ: DMND); First Solar, Inc. (NASDAQ: FSLR); Green Mountain Coffee Roasters, Inc. (NASDAQ: GMCR); Groupon, Inc. (NASDAQ: GRPN); Human Genome Sciences, Inc. (NASDAQ: HGSI); LinkedIn Corporation (NYSE: LNKD); Netflix, Inc. (NASDAQ: NFLX); RadioShack Corporation (NYSE: RSH); Research in Motion Limited (NASDAQ: RIMM); and Sirius XM Radio Inc. (NASDAQ: SIRI).   Does this make for a “Short-Sell in May and go away!” theme?  The short interest changes are for the April 13 versus March 30 settlement dates, with selective color added if applicable:   Alcatel Lucent S.A. (NYSE: ALU) saw another rise in the short interest but this gain was massive by over 25% to 28.67 million shares in the short interest.  Based on its earnings botch, the short sellers made some real money here.

Banco Santander, S.A. (NYSE: STD) is not one of our usual short interest names but investors are back to betting against Spain and the PIIGS all over again now that austerity measures are being fought publicly.  The prior gain was a whopping 214% gain in the short interest to 55.7 million shares and the newest gain was only 2.5% to 57.1 million shares.

Bank of America (NYSE: BAC) is back to seeing a rise in the short interest after a prior drop.  Short sellers lifted the short interest by 9.9% to 142.3 million shares.

Barnes & Noble, Inc. (NYSE: BKS) saw a small increase ion its short interest, which you know helped to exacerbate that pop from the Microsoft deal while activist investors press on here.  The short interest rose another 3.7% to 19.768 million shares.