SEC probe of B. Riley widens as struggling firm's stock drops more than 50% on profit warning

The feds have widened a probe of financial irregularities at B. Riley, sources told The Post — even as the struggling Wall Street firm suspended its dividend and warned on profits Monday, sending its stock tumbling more than 50%. Short sellers in June and July continued to deliver information on B. Riley to the Securities and Exchange Commission — and the SEC has asked them for additional material in a continuing probe, according to emails and texts reviewed by The Post. SEC investigators are interested in ...