McGraw-Hill (MHP -4.2%) maintains the decision for its S&P division to downgrade U.S. debt...

|By:, SA News Editor

McGraw-Hill (MHP -4.2%) maintains the decision for its S&P division to downgrade U.S. debt is "fire-walled, and independent from the rest of our business." The issue becomes interesting in light of a challenge the firm faces from an acitvist hedge fund to consider a break-up of the company. Would a publicly traded S&P suffer an investor backlash?