This morning, Tenet Healthcare Corporation (THC: sentiment, chart, options) received a bit of a boost. Specifically, UBS raised the shares from "sell" to "neutral," and investors cheered the news; the stock rallied more than 2.5% today.

To be honest, I am at a bit of a loss for why the brokerage firm deemed the healthcare company worthy of an upgrade. The stock has trailed the S&P 500 Index (SPX) by more than 74% during the past 60 trading days, which, considering the broad market's recent performance, is quite impressive.

However, THC's sentiment reading is pretty negative. According to Zacks, the equity harbors only 1 "strong buy," and 13 "hold" or worse ratings. Furthermore, short sellers have sold short more than 30.62 million THC shares, accounting for more than 6% of the company's float. Elsewhere, short-term option players are also pessimistic. The Schaeffer's put/call open interest ratio (SOIR) is docked at 1.13, indicating that puts outnumber calls among options slated to expire within 3 months.

Today's 3 cent gain, helped the stock, but I think it is going to take more than just an upgrade to rally get these shares moving. Looming directly overhead is the equity's 10-day moving average. This trendline could stifle any near-term rally attempts.