A longer-term security due in 2012 was priced to yield 6.30 percent.

Among longer-term securities, prices declined even though the Treasury market continues to benefit from a lack of supply.

Concern about a rush of new, longer-term securities continued to build in the credit markets.

However, they added that the price gains, which amounted to more than three-eighths of a point among longer-term securities, could have been larger.

Much of the selling yesterday was concentrated among longer-term securities.

The window of opportunity for investors may be brief, but that has not stopped them from pouring money into longer-term securities.

But their rates are in effect for only a few months and they provide a lower yield than would be expected from longer-term, inflation-indexed securities.

The Treasury said it hoped to buy back up to $30 billion in longer-term securities by the end of 2000.

If necessary, troops will have to be deployed, as the Commissioner said, to ensure longer-term security.

It was also helped by the dwindling supply of longer-term securities, after the Treasury cut its sales.