Tech Five: More companies join Apple Pay

Apple's fledgling payments service is finding support from more companies. Let's look at the technology stocks to watch Tuesday:

Apple. The tech giant says its Apple Pay service backs credit cards that generate 90% of the purchase volume in the U.S., according to The New York Times. SunTrust and USAA are among the latest banks that have thrown support toward Apple Pay, which launched in October.

Sony. The aftermath continues in the wake of an incredible data breach impacting Sony Pictures Entertainment. The studio organized an all-hands meeting, while representatives attempt to squash reports on the information hackers are posting.

GrubHub. Shares of the online food delivery service are up 1.7% in pre-market trading after Goldman Sachs upgraded its stock to "buy," reports CNBC. In August, GrubHub stock reached a six-month peak of $45.21 before sliding to the $31 mark as of morning trading.

Microsoft. The company has found new allies in a battle against the U.S. government over e-mails stored on servers in Ireland. Fellow tech companies Amazon, HP and eBay have thrown support to Microsoft.

Amazon. Consumers will get a little extra time to order those last-minute Christmas items. Amazon will extend Christmas shipping to December 19.

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