Yields on Fannie Mae and Freddie Mac mortgage bonds tumbled, pushing down interest rates on new home loans after a climb earlier this week that added to signs the housing market and economy may not soon recover.

Yields on Washington-based Fannie Mae’s current-coupon 30- year fixed-rate mortgage securities declined 0.23 percentage point today to 4.33 percent as of 4:30 p.m. in New York, according to data compiled by Bloomberg. Even with today’s drop the yield is up from 3.94 percent on May 20. Increases this week, spurred in part by a jump in Treasury yields, at one point were as big as any since 1984 in percentage terms.

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