As the recent iPad Mini, Graph Search and BlackBerry 10 launches revealed, secret product announcements now have a negative impact on a tech stock's price.

Just when it looked like Facebook (NASDAQ: FB) had turned the corner, a disappointing fourth-quarter earnings report knocked the social network’s stock back 6.5% entering Thursday trading.

Research In Motion (NASDAQ: RIMM) unveiled a new phone and a new company name this morning. So far, none of it is impressing investors.

Facebook (NASDAQ: FB) has released a new "graph search" function that is being met with a collective yawn on Wall Street.