The Financial Industry Regulatory Authority has narrowed the application of its suitability rule to actual customers rather than to any potential investor, says Caitlin Nish of The Wall Street Journal. "Now a broker doesn't necessarily have to worry about a recommendation made to someone who doesn't act on it, or who executes that transaction away from their firm or on their own. But brokers still have to be very concerned about suitability in general," Nish says, noting that unsuitability is a claim that is commonly involved in arbitration.