NEW YORK, Dec 15 (Reuters) - The one-month U.S. Treasury bill yield turned negative in a safe haven bid on Monday, while signals of deflation in a factory index briefly lifted longer maturity government securities prices into positive territory.
The one-month Treasury bill yield turned slightly negative according to data from online fixed income trading platform TradeWeb US1MT=TWEB, showing that investors were paying a fee to keep their money in ultra short-dated government instruments.
The 30-year Treasury bond briefly turned higher in price for a yield of 3.04 percent US30YT=RR, versus 3.05 percent late Friday.
Reporting by John Parry; Editing by XXX
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