House Republicans have already introduced a variety of separate bills to clamp down on Fannie Mae and Freddie Mac while the two government-sponsored enterprises remain in conservatorship, and a key GOP lawmaker this week introduced legislation intended to jumpstart a private MBS market to take over when the agencies are finally dissolved. The Private Mortgage Market Investment Act, drafted by Rep. Scott Garrett, R-NJ, would create a heavily regulated MBS market made up solely of private entities functioning with no federal guarantee at all. The lawmaker, who chairs the House Financial Services Subcommittee on...