AP story, includes “The U.S. Securities and Exchange Commission has joined a federal probe of Pennsylvania’s largest pension fund and is seeking among other things records to determine whether improper ‘compensation and gifts’ may have been offered staff … The Philadelphia Inquirer reports that the commission is also seeking records earlier sought by the U.S. attorney's office about what officials of the $64 billion Public School Employees’ Retirement System have called a mistake in calculating the fund’s long-term investment performance.”