Why 'sell in May' may be getting a bum rap By: CNBC.com News April 29, 2014 at 09:42 AM EDT The "sell in May and go away" concept has worked briefly for the last few years. It may be a function of other crises going on in the world, however. Read More >> Related Stocks: Nasdaq Biotechnology Ishares ETF S&P Semiconductor SPDR Twitter, Inc. US Home Construction Ishares ETF