Nasdaq Q's (the cube) was changed from QQQ to QQQQ some time back. And now it is being changed back from QQQQ to QQQ. Somebody couldn't make up their minds? http://www.forbes.com/2011/03/23/nasdaq-qqq-loses-a-letter-in-its-ticker-marketnewsvideo.html
what a fucking nightmare, noone in my team slept at all last night. All the product reference data was a mess coming morning, they just had to do this right after options expiration weekend. Assholes.
Wonder why it took them this long to change back. NASDAQ stocks have been allowed to have fewer-than-4-letter tickers for awhile.