How to Check on Your Broker

Wall Street's Watchdog Doesn't Disclose All Regulatory Red Flags

States Move to Share Data on Problem Brokers

Graphic: Where Troubled Stockbrokers Are

How the Journal Found Troubled-Broker Hot Spots

How Troubled Brokers Cluster, Often Among Elderly Investors

Stockbrokers who've been in trouble with regulators tend to cluster where the affluent and elderly are easily accessible.