Investors demand LBO protection in US bonds By: Reuters: Company News February 22, 2013 at 10:57 AM EST Feb 22 (IFR) - The resurgence of large leveraged buyouts is prompting US investment-grade debt investors to insist on more protection in some new issues. Read More >> Related Stocks: Berkshire Hathaway Emerson Electric Kohl's Corp Staples Whirlpool Corp