NEW YORK ( TheStreet) -- Moody's ( MCO) stole the show in the financial sector Thursday morning, rising as much as 8% after boosting its earnings guidance for 2010.

The ratings agency's stock was recently trading up 6.7% at $29.14, off of an earlier high of $29.47. Before the market opened, Moody's said it expects to report earnings of $2.08 per share to $2.14 per share, up from previous guidance of $1.90 per share to $1.96 per share. That outlook compares with an average analyst forecast of $1.91 per share, according to Thomson-Reuters.

Goldman Sachs ( GS) was trading lower as Wall Street continued to buzz about its purported Facebook deals. Its stock was down 0.9% in recent trading at $172.48, following reports with more details on how the company first passed up an investment in Facebook, then invested $450 million in the social site, then helped clients get a piece of the pie. Facebook isn't publicly traded, but thanks partly to Goldman , its valuation is now widely reported at $50 billion.

Other large-cap financial stocks were mixed.

American International Group ( AIG) was tracking 1.1% lower late Thursday morning at $60.30, following a sharp run-up in recent sessions. A securities filing released on Thursday indicated that the Securities and Exchange Commission questioned AIG's plans to sell its Asian life-insurance subsidiary, AIA, to the public market. However, the 8-K pertained to an SEC query months ago that was settled; AIA ended up raising more than $20 billion, the largest IPO ever on Hong Kong's stock exchange.

JPMorgan Chase ( JPM) was also trading down 0.4% at $44.51. Earlier in the day, Thomson-Reuters reported in its annual fee tally that JPMorgan's investment bank had bested competitors like Goldman, Morgan Stanley ( MS), Citigroup ( C) and Bank of America ( BAC) to top the league tables. While JPMorgan saw the biggest decline in investment banking fees, of 11%, it raked in $5.4 billion, far ahead of BofA-Merrill Lynch, which had $4.8 billion.

Bank of America was down 0.2% in recent trading, at $14.47, while Morgan Stanley was down 0.4% at $28.72. Citi was up 0.5% at $4.99. The stock hit $5 for the first time since April on Wednesday and broke through that level for the first time in as long on Thursday, hitting $5.05 earlier in the day.

Among regional bank stocks, Comerica ( CMA) was one of the biggest losers, dropping 3% to $41.90 in recent trading, after an Oppenheimer stock analyst downgraded its shares to "perform" from "outperform." PNC ( PNC) was one of the winners, recently up 1% at $62.40.

-- Written by Lauren Tara LaCapra in New York.

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