MGIC, Radian, PMI downgraded by Standard & Poor's
Costs on adjustable-rate products ease in survey
Fitch downgrade follows capital warnings
OFHEO scraps plan to require reductions
Costs still lower than a year ago
$100 billion liquidity for mortgages backed by Fannie, Freddie
Freddie Mac: Dip coincides with reports on inflation, retail sales, rate cut
Move gives GSEs leeway to buy up additional $200 billion in loans
Freddie Mac: Average on 30-year fixed loans still below 5.9% year-to-date
GSEs have trimmed loan portfolios to counter losses