U.S. Treasury increased in Friday

The prices of American U.S. Treasury increased in Friday (the profitability fell down), after the serial affraids around the credit markets and weak datas for shortened 63 000 working places in USA for February - the largest decrease of employment for five years.
After these bad datas, the profitability of 10 years U.S. Treasuries broke to 3.483%, but after that partially turn back places because of the news for two auctions on value 100 billions USD given of FED in March with purpose to increase the money value. The profitability of 10 years Treasuries closed in Friday with 3.541%, which is still a little bit down from the closing in Thursday.
The profitability of 2 years U.S. Treasuries finished the day with 1.53% after the fell of 1.5% earlier in the day.