Wall St. Turns to the Time Out as Punishment
Regulators are wielding new weapon against Wall Street firms in hope that it might hurt more than multimillion-dollar fines: temporarily shutting down certain business lines; NASD last week prohibited Merrill Lynch and Wachovia Securities from registering brokers for five days on top of fining firms: $1.6 million for Merrill and $650,000 for Wachovia; each firm had failed to report to NASD on-time information including customer complaints, regulatory actions and criminal charges and convictions about brokers (M)