The 30-year Treasury bond on Friday nearly breached the psychologically important 6.5% yield level, buoyed by a combination of weaker-than expected economic news and light trading activity, economists and traders said.

The 30-year bond finished the afternoon 1/8 point higher in price to yield 6.538%. the lowest yield since the goverment began holding regular 30-year bond auctions in 1977, economists say. Most other securities ended unchanged to slightly higher.

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