Invesco liquidated its fund in the Public-Private Investment Program this month, earning a strong 18.2 percent cumulative net internal rate of return on $2.3 billion in capital. “The PPIP program has resuscitated the private-label mortgage-backed securities market and, at least in our case, resulted in a handsome profit to the Treasury Department,” said Wilbur Ross, chairman of the Investment Committee of the fund and chairman and CEO of WL Ross & Co. “We are proud to have participated in it.” Among the seven non-agency public-private investment funds that were participating in the PPIP ... [Includes one data chart]