NEW YORK (

TheStreet

) -TheStreet Ratings' stock model upgraded

FLIR Systems

(FLIR) - Get Report

to 'Buy' from 'Hold'. Revenues at this $4.3 billion market cap, high tech camera supplier rose 16% to $332.5 million in the fiscal third quarter as compared to the same quarter last year.

TheStreet Ratings released rating changes on 17 U.S. common stocks for November 29, 2010. In total, 11 stocks were upgraded and 6 stocks were downgraded by our stock model.

In the third quarter, FLIR Systems reported net income of $63 million, a 5% improvement over the $60 million profit from a year ago. Learn more about FLIR Systems:

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$730 million market cap, specialty hydrocarbon producer,

Calumet Specialty Product Partners

(CLMT) - Get Report

was upgraded to 'Buy' from 'Hold'. In third quarter results, Calumet's gross revenue increased by 21% to $595.2 million while net income rose to $21.2 million from $4 million a year earlier. Learn more about Calumet Specialty Product Partners

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-- Reported by Chris Stuart in Boston, MA.

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Chris Stuart, CFA, equity research manager, joined TheStreet.com Ratings after working as a senior investment analyst with Merrill Lynch, covering Small Cap Equity and Alternative investment strategies. Prior to that, Chris gained analytical and investment experience, working for One Beacon Insurance as an Actuarial Analyst, and H&R Block as a Financial Advisor. He earned his Bachelor's degree in Finance from the University of Massachusetts Amherst. He holds a Chartered Financial Analyst (CFA) designation, and is a member of the Boston Security Analysts Society (BSAS) and the CFA Institute.