The headquarters of the U.S. Securities and Exchange Commission (SEC) are seen in Washington, July 6, 2009. REUTERS/Jim Bourg (UNITED STATES BUSINESS POLITICS)By Ross Kerber and Sarah N. Lynch

BOSTON/WASHINGTON, Jan 19 (Reuters) РFor U.S. Securities and Exchange Commission Chairman Mary Schapiro, the choice of a Goldman Sachs Group  insider as her new top funds regulator could be a double-edged sword.