The Securities and Exchange Commission is pushing to suspend Standard & Poor's from rating commercial mortgage bonds, according to a new report.
Citing a single source with knowledge of the matter, Bloomberg reported the rating firm's parent company, McGraw Hill Financial, is still negotiating a potential settlement with the SEC despite the threat of a suspension. The federal agency has been investigating whether S&P altered its rating criteria to gain customers in 2011.
McGraw Hill's stock fell as much as 4.3 percent after the Bloomberg report and finished the day down about 2 percent.
The issue of a suspension had been the focus of the settlement discussion, Bloomberg quoted its source as saying, with S&P arguing that such a penalty would have major consequences to its reputation.
A spokeswoman for S&P declined comment to CNBC, and the SEC did not immediately return calls for comment.
In October, McGraw Hill said it was in