The Russell 2000 small cap index is holding on to its early gains in thin trading as investors look to the three-day weekend.&nbsp; At 2:41 p.m. ET the Russell 2000 had gained 4.20 points, or 0.51%, to 828.00.&nbsp; The Dow Jones Industrial Average was up 45.02 points, or 0.33%, to 13,486.15.<br /> <br /> Shares of <strong>IDM Pharma Inc.</strong> (Nasdaq: IDMI) are rising on news of positive analyst coverage.&nbsp; Brokerage house Cantor Fitzgerald expects that the stock price of the Irvine, Calif.-based company will quadruple over the next year, according to news reports after the opening bell.

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