They have received investment-grade ratings from the three major rating services and are fully secured.

An investment-grade rating would make the bonds far more valuable.

But even an investment-grade rating could not save Enron's business from collapse over the last month.

Those securities first in line received investment-grade ratings from rating agencies.

About 70 percent of all holdings have investment-grade ratings.

Meanwhile, the city remains in a very stable financial position with high, investment-grade ratings.

The carrier has long coveted an investment-grade rating for its bonds.

The bonds have been given an investment-grade rating by Standard & Poor's.

Companies that had been unable to get an investment-grade rating were able to issue the bonds.

If we lost our investment-grade rating, it would probably destroy us.