NEW YORK (REUTERS).- With financial markets remaining stubbornly shaky, auction houses in New York are gearing up for critical fall auctions which feature several works each poised to fetch $30 million or more. “The financial markets have been volatile all year, yet the art market has continued to perform well,” said Marc Porter, chairman of Christie’s Americas. “It’s incredibly strong.” Christie’s and Sotheby’s are both offering many works that are valued over $10 million, and each has offerings expected to fetch $25 million or even $40 million. Roy Lichtenstein’s “I Can See the Whole Room! … and There’s Nobody in It!” is estimated to sell for up to $45 million at Christie’s, and could even set a record. Degas’ bronze sculpture, “Petite danseuse de quatorze ans,” cast after his death and one of only 10 remaining in private hands, will lead its Impressionist and modern sale on November 1 when it could fetch