BOSTON (TheStreet) -- Nokia (NOK - Get Report) and Time Warner (TWX) had the largest increases in short interest, according to data from the New York Stock Exchange, even as investors turned less bearish.Short interest, which measures all uncovered short positions in securities, fell during the second half of February, according to the NYSE. Short positions are bets that a stock will fall, where investors borrow shares and sell them at a higher price, hoping to buy the stock back at a lower price to profit on the difference. According to the NYSE, overall short interest fell to 12.6 billion shares through Feb. 28, down more than 1% from 12.8 billion shares on Feb. 15. During that same period, the S&P 500 fell less than 0.1%. The markets have taken a turn for the worse since as oil and commodity prices continue to soar. Since March 1, the S&P 500 has dropped nearly 2%, including Thursday's 17-point decline, while oil has topped $100 a barrel. Several equities listed on the NYSE had rapid increases in short interest during the last half of February, some by as much as 50%. Short interest is one indicator that long investors in these stocks could be in for painful declines. Nokia, for instance, saw short interest balloon to nearly 100 million positions, putting it in the top 5 NYSE stocks with the largest current short positions, which routinely includes Citigroup ( C), Ford Motor ( F) and Sprint Nextel ( S). The following is a list of 10 stocks that saw the largest percentage increases in short interest from Feb. 15 through Feb. 28, ranked in reverse order. This data was pulled from the NYSE and NYSE Arca's top 100 positions, which is released on a bi-monthly basis.
D.R. Horton ( DHI) Company Profile: D.R. Horton constructs and sells homes in U.S. Through the company's financial services operations, it also provides mortgage financing and title agency services. Short Interest Change: Short interest in D.R. Horton climbed 8.4% to almost 29 million positions as of Feb. 28. Not surprising, the stock is down 3.4% in the last month. D.R. Horton shares were hit hardest on Feb. 22 after the S&P Case-Shiller 20-city index -- a key read on the housing sector -- fell 2.4% from a year ago.
General Motors ( GM - Get Report) Company Profile: GM is the world's second-largest automaker, which emerged from Chapter 11 bankruptcy and completed the world's biggest initial public offering in November. Short Interest Change: Short interest in GM rose 10.8% to 28.8 million positions as of Feb. 28. While the automaker was a high flying IPO pick for hedge fund managers, the stock actually now trades below its IPO price.
Exxon Mobil ( XOM - Get Report) Company Profile: Exxon Mobil is engaged in the exploration, production, transportation and sale of crude oil and natural gas and the manufacture, transportation and sale of petroleum products. Short Interest Change: Short interest in Exxon Mobil rose 12.5% to 33.4 million positions as of Feb. 28. As the price of oil has spiked, so have shares of Exxon, gaining more than 10% from the beginning of the Egyptian protests through a recent peak on Feb. 23 amid the crisis in Libya. Since Feb. 16, though, the stock has slipped 1.6%, which may be an indication that traders are booking quick profits in the oil giant.
AMR Corp. ( AMR - Get Report) Company Profile: AMR Corp. is the parent of American Airlines, which provides scheduled jet service to approximately 160 destinations. Short Interest Change: Short interest in AMR rose 18.9% to 47.2 million positions as of Feb. 28. It's not surprising that as oil prices have held above $100 a barrel, airline stocks have crumbled and fees have ballooned. After crude surged above $100 on Feb. 18, AMR shares have fallen nearly 15%.
Nokia ( NOK - Get Report) Company Profile: Nokia manufactures mobile devices that offer Internet services, music, maps, media, messaging and games. Short Interest Change: Short interest in Nokia soared 50.5% to 98.6 million positions as of Feb. 28. Nokia shares have plunged more than 20% in the last month, even after news came that Microsoft ( MSFT) would pay the handset maker billions of dollars after Nokia agreed to adopt Windows Phone 7.