A summary of Southern California-related business litigation developments during the past week.

Sylvester Stallone Sues His Art Dealer: The actor filed a $5-million civil fraud suit Tuesday in Los Angeles Superior Court against his New York art consultant, Barbara Guggenheim, claiming that he overpaid for art and sold it for less than market value on her advice. The suit charges that Guggenheim prompted Stallone to pay for a damaged oil painting by Adolphe William Bouguereau after she called it a “masterpiece.” Stallone also charged that Guggenheim defrauded him in several other transactions. (Filed Dec. 26, 1989, Case No. C747552)