Tech Five: Best Buy shares sink off earnings

Shares of electronics giant Best Buy are getting dinged on Wall Street, while Salesforce is on the rise off an upgraded fourth-quarter outlook.

Let's look at tech stocks to watch Thursday:

Best Buy. Shares plunged more than 9% in pre-market trading despite topping Wall Street forecasts on earnings for the third quarter. Best Buy reported earnings per share of 41 cents, ahead of estimates of 35 cents.

Salesforce. Shares vaulted more than 5% after the cloud computing company after beating third-quarter expectations. Salesforce CEO Marc Benioff says the company is on pace for its first $8 billion year in fiscal 2017.

Square. The long-awaited initial public offering of the digital payments service co-founded by Twitter CEO Jack Dorsey makes its debut. Shares will trade on the New York Stock Exchange under the ticker "SQ." Shares were priced at $9, below Square's range of $11-$13.

Amazon. The online retailer has enabled two-factor authentication to secure users' shopping accounts. According to Engadget, the option launched a couple weeks ago following a private beta. Two-factor authentication requires users type in a special code sent to their smartphone after they log in.

Google. The company announced Neal Mohan will serve as YouTube's new product chief. Previously, Mohan was in charge of Google's video and display advertising.

Follow Brett Molina on Twitter: @brettmolina23.