Among the stock activity stories for Tuesday, June 9, from AP Financial News:

NEW YORK (AP) ¿ Shares of Rigel Pharmaceuticals Inc. jumped after a Rodman & Renshaw analyst gave the stock a positive rating, citing the potential for a developing rheumatoid arthritis drug to compete in the market.

NEW YORK (AP) ¿ Shares of Mueller Water Products Inc., which makes flow control products, rose after an analyst upgraded the shares on a recent decline in price, prospects for favorable changes to the company's loan agreement and the likelihood that product demand is set to climb.

PORTLAND, Ore. (AP) ¿ Shares of regional grocer Spartan Stores Inc. jumped in trading following an upgrade by a Jeffries & Co. analyst.

NEW YORK (AP) ¿ Shares of SEI Investments Co. advanced after an analyst upgraded the investment manager and processor, citing improving sales and recent strength in the equity market.
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