WASHINGTON (AP) — Investors are waiting to hear whether the new head of the Federal Reserve, Janet Yellen, will embrace all the policies of her predecessor, Ben Bernanke.

Yellen will deliver the Fed's twice-annual report to Congress, starting today before the House Financial Services Committee and then Thursday before the Senate Banking Committee.

Anticipation of her testimony is running high, given concerns about the economy and the job market, turmoil in global markets and uncertainty about her direction at the Fed.