Shares of Wrigley ( WWY) were among the NYSE's losers Wednesday, sliding 7% after the gum and candy maker posted third-quarter earnings slightly below Wall Street's estimate. Wrigley posted earnings of $164.5 million, or 59 cents a share, up 11% from a year earlier. Analysts expected earnings of 60 cents a share, according to Thomson Financial. Sales rose 13% to $1.33 billion, slightly higher than Wall Street's target of $1.31 billion. Still, shares were down $4.70 to $62.15. Norfolk Southern ( NSC) fell 5% after the railroad operator posted a profit drop and lower-than-expected revenue. For the third quarter, the company's earnings fell 7% to $386 million, or 97 cents a share, hit in part by a tax-related charge of 5 cents a share. Excluding the charge, earnings were in line with analysts' target. Revenue fell 2% to $2.35 billion, short of the $2.41 billion that analysts anticipated. Shares of Norfolk Southern were down $2.54 to $51.46. Shares of Moody's ( MCO) shed 2.5% after the ratings firm reported lower-than-expected earnings and cut its guidance for the year. Moody's third-quarter profit dropped 13% to $136.9 million, or 51 cents a share. Analysts expected earnings of 51 cents a share. Revenue inched up 6% to $525 million, topping Wall Street's estimate of $520.3 million. For the year, Moody's now expects flat earnings due to troubles in the global debt markets. Excluding one-time items, the company anticipates earnings per share in 2007 to grow in the mid- to high-single-digit percentage range. Previously, the company forecast growth in the low- to midteens. Shares of Moody's were off $1.17 to $46.21.