Full exit through secondary trading, with 42% gain in short period.

Although Treasury bill rates were little changed in secondary trading.

Bill rates were down an average of 5 basis points in secondary trading.

Interest rates on Treasury bills were little changed in secondary trading.

In secondary trading late yesterday, one-year bills were offered at 7.65 percent, up one basis point on the day.

In secondary trading last Friday, one-year bills were offered at 7.22 percent.

In secondary trading, prices of Treasury bonds and notes were little changed on the day.

But, many experts said, the secondary trading necessary to make the market attractive to large investors is still slow in developing.

Short-term Treasury bill rates were little changed in secondary trading yesterday.

The new rule permits secondary trading among institutions with holdings of more than $100 million.