Plus, a spike in September West Texas Intermediate crude oil to a record NYMEX closing high of $66.86 prompted some flight to safety given concerns of an adverse impact on the economy.
The 10-year note climbed 13/32 to 100-02/32 for a yield of 4.24%. The 30-year bond surged 36/32 to 114-02/32 for a yield of 4.47%.
Stocks were broadly lower as bond trading closed. The dollar was mixed as short covering following the recent rally offset the weak June trade data.