A Princeton study has found that in the short term, stocks with easy to pronounce monikers perform better than less fluent ones. It seems that the biggest effect is at the IPO:

To prove the point, the pair finally analysed how well companies performed on the basis of their three-letter stock ticker code, which a company doesn't determine itself. Amazingly, pronounceable codes such as KAR still tended to do much better than unpronounceable ones such as RDO. Once again, the pair invested their fictitious $1,000, and found that the fluent codes were $85 up on the first day, although the portfolio was just $20 ahead after a year.