NEW YORK (

TheStreet

) -TheStreet Ratings' stock model upgraded

JPMorgan Chase & Co

(JPM) - Get Report

to 'Buy' from 'Hold'. Net income at this $159 billion market cap, money center bank advanced by 76% in the second quarter to $4.8 billion over second quarter 2009.

TheStreet Ratings released rating changes on eight additional U.S. common stocks for September 17, 2010. In all, four stocks were downgraded and five stocks have been upgraded by our stock model.

The stock model recommends buying JPMorgan Chase in advance of the release of third quarter results at 7 a.m. on October 13, 2010. Analyst estimates of third quarter earnings per share have trended higher over the last 90 days and currently stand at 89 cents per share, an improvement over third quarter 2009. Learn more about JPMorgan Chase:

Company Profile

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Income Statement

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Balance Sheet

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Stock Ratios

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Analyst Ratings

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Heading the other direction, shares in

General Dynamics Corp

(GD) - Get Report

were downgraded to 'Hold' from 'Buy'. General Dynamics stock set fresh 52-week low of $55.46 at the end of last month, a drop of 30% from its April high. Net operating cash flow has decreased to $477 million or 21% when compared to the same quarter last year. Learn more about General Dynamics:

Company Profile

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Income Statement

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Balance Sheet

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Stock Ratios

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Analyst Ratings

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-- Reported by Kevin Baker in Jupiter, Fla.

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Kevin Baker became the senior financial analyst for TheStreet Ratings upon the August 2006 acquisition of Weiss Ratings by TheStreet.com, covering mutual funds. He joined the Weiss Group in 1997 as a banking and brokerage analyst. In 1999, he created the Weiss Group's first ratings to gauge the level of risk in U.S. equities. Baker received a B.S. degree in management from Rensselaer Polytechnic Institute and an M.B.A. with a finance specialization from Nova Southeastern University.