It was choppy trading for the markets Tuesday, but the indices weathered the storm and landed in the green with the Standard & Poor's 500 closing up 7.25 points, or 0.78%, at 934.70.

Here’s a look at some of the session’s winners and losers:

Winners

American Capital Ltd. (ACAS)
Shares of the principal investment firm soared 40.58% today, following the general upswing of the financial sector.

Developers Diversified Realty Corp. (DDR)
News that the manager and developer of the shopping-center stands promoted two executives sent the stock jumping 35.96%.

Ciena Corp. (CIEN)
An upgrade from an analyst sent shares of the communications equipment maker up 18.64%

LSI Corp.(LSI)
Shares of the electronics company increased 18.04% along with others in the tech sector.

JDS Uniphase Corp.(JDSU)
The communications equipment company jumped 15.89%.

Losers

Intercontinental Exchange Inc. (ICE)
Following the release of the company’s December trading volume data, shares of the global exchange and OTC market operator dropped more than 10%. Last year was a rough one for the company with its stocks dropping 60%.

Celgene (CELG)
A downgrade from an analyst citing worries the company won’t meet 2009’s growth expectations sent shares of the biopharmaceutical company falling 7.16% today.

Laboratory Corp. of America Holdings (LH)
The provider of clinical laboratory services cut its 2009 earnings and revenue projections saying it now expects to earn $4.75 to $4.95 a share compared to earlier estimates of $5 to $5.25. The gloomy outlook sent the company's stock down 6.49%.

Coventry Health Care Inc. (CVH)
After being downgraded by a analyst at Deutsche Securities shares of the health-care company fell 6.25%.

Quest Diagnostics Inc. (DGX)
The maker of medical diagnostic tests fell 5.88% after it declared a quarterly cash dividend on Quest Diagnostics common stock of $0.10 per share.