The CEOs of Fannie Mae and Freddie Mac told CNBC that said some of the money made available to the home-financing market due to looser capital rules will go toward the so-called jumbo mortgage market.

Earlier, the Office of Federal Housing Enterprise Oversight lowered the capital requirement on government-backed mortgage lenders Fannie Mae and Freddie Mac to 20 percent from 30 percent, a move that will provide up to $200 billion in immediate liquidity for stressed mortgage markets.