Tech stocks: Zynga, Qualcomm sinking

Here's a look at the tech stocks to watch for Thursday.

Zynga plunging. Shares of the social gaming company fell 9% in pre-market trading after lowering forecasts for the current quarter. Their first-quarter results topped Wall Street expectations, with a profit of $4 million off $264 million in revenue.

The company also continues to drop monthly active users, down 13% compared to last year.

Qualcomm slides. The tech company's stock dropped 4.5% off a third-quarter profit forecast that falls short of what analysts are expecting, according to Bloomberg. However, the company posted record revenue of $6.12 billion during its second quarter.

Apple rising slightly. After an up-and-down week that saw its stock dipping below $400, Apple shares are up 1% early at $409.80.