Regulators at the National Association of Securities Dealers are examining several possible violations of a new rule that restricts municipal market employees from making campaign contributions, including one that recently led to the firing of a Kidder, Peabody & Co. official.

At the moment, the NASD is conducting 25 "special exams," or spot checks, on firms complying with the campaign contribution rules. The findings are not yet available.

Limited Time Offer

Save $400 off your subscription. Special offer ends April 30, 2017.

14-Day Free Trial

No credit card required. Complete access to articles, breaking news and industry data.