We lowered the rating on Greek sovereign debt to BBB, and spreads stayed just below levels for AA rated bonds. But when we lowered the rating to BB, we saw spreads hit CCC bond levels.

我们将希腊主权债信评级下调至BBB级别时，其收益率仍维持在比AA级债券略低的水平，可当我们进一步下调至BB级时，其收益率一下子飙升至CC C级债券的水平。

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The ratings service cited the thrift's exposure to the mortgage securities market, downgrading it to BB-minus from BBB-minus.

FORBES: Magazine Article

Everything from BBB and above is considered investment grade, while anything BB and below is considered junk.

FORBES: How To Buy An Individual Bond

Corporate bonds rated BBB are yielding 8%, while their below-investment-grade BB brethren yield 9%.

FORBES: Magazine Article