WASHINGTON — Federal regulators are reviewing what JPMorgan Chase told investors about its finances and the risks it took weeks before suffering a multibillion-dollar trading loss.

Mary Schapiro, chairman of the Securities and Exchange Commission, told the Senate Banking Committee today that the agency is examining JPMorgan’s earnings statements and first-quarter financial reports to determine if they were “accurate and truthful.”

Schapiro and Gary Gensler, chairman of the Commodity Futures Trading Commission, said the $2 billion-plus loss at JPMorgan should be a lesson for regulators to tighten rules as they draft them under the 2010 financial overhaul law.