Delta Air Lines (NYSE:DAL) stock was on the rise today, as passenger revenue grew 4% in February, a surprising metric when considering that the company cancelled around 8,000 flights last month. Second-quarter profits for AutoZone (NYSE:AZO) were up more than 9%, with same-store sales and gross margins up as well. The retailer was likely boosted by the especially harsh winter, which was tough on vehicles. Plug Power (NASDAQ:PLUG) popped by double digits again today, after the hydrogen cell maker announced a deal last week with six Wal-Mart distribution centers. And Tesla Motors (NASDAQ:TSLA) announced today that it plans to expand in Europe, with 30 new service centers and stores across the continent.

In this segment from Tuesday's Investor Beat, host Chris Hill and Motley Fool analysts Morgan Housel and Mike Olsen look at four stocks moving on the market today.