The small cap index is gaining ground this morning, as investors react to news of stronger-than-expected U.S. productivity growth.  In specific small cap action, shares of Hansen Medical, Inc. (Nasdaq: HNSN) got a lift on news U.S. regulators cleared the company’s medical mapping technology, while Town Sports International Holdings, Inc. (Nasdaq: CLUB) reported a quarterly net loss.

At 11:19 a.m. ET the Russell 2000 had added 1.40 points, or 0.17 percent, to 829.86.  The Dow Jones Industrial Average was up 15.76 points, or 0.12 percent, to 13,227.64.

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