After the dot-com bust a decade ago, regulators forced Wall Street to adopt rules aimed at keeping stock analysts from over-praising companies doing deals with their banks. President Barack Obama is set to sign a law that would undo at least some of the changes.

One measure in the bill, passed by Congress March 22 to ease securities rules for closely held firms, would restore communication between bank research and underwriting arms. Those links were restricted in 2003 by regulators and by a separate settlement between then-New York Attorney General Eliot Spitzer and 10 firms including Goldman Sachs Group Inc. and JPMorgan Chase & Co.

Spitzer forced the banks to restructure their practices after his office obtained internal e-mails from Merrill Lynch & Co. analysts who privately called dot-com stocks they had recommended "dogs" and "crap."