Despite upbeat results from Citigroup, the markets traded mixed during the midday after Google disappointed with earnings that fell short of expectations. The Dow gained 25 points to 11,472 while Nasdaq plunged 26 points to 2287.

On the upside

Comerica (NYSE: CMA) reported sharply lower second quarter earnings due to loan loss provisions but the results topped expectations.

Although second quarter earnings for Tempur-Pedic International (NYSE: TPX) fell, the results surpassed estimates.

Shares of Pacific Ethanol (Nasdaq: PEIX) rose after UBS upgraded the ethanol sector.

On the downside

SemGroup Energy Partners (Nasdaq: SGLP) announced yesterday that it may file for Chapter 11 bankruptcy protection due to liquidity problems.

Evergreen Solar (Nasdaq: ESLR) widened second quarter losses and forecast third quarter results below expectations.

IStar Financial (NYSE: SFI) blamed higher loan loss provisions and increased write-downs for warning that second quarter results will fall short of estimates.

In the broad market, advancing issues barely edged out decliners by a slim margin on the NYSE while decliners outpaced advancers by nearly 10 to 9 on Nasdaq. The Russell 2000 which tracks small cap stocks lost a point to 696.