They also come into contact with bond, a high-grade paper used for important documents.

他们也会接触到铜版纸，一种高级的重要文件用纸。

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On the other hand, housing didn't produce returns as high as high-grade bond funds or gold.

FORBES: Real Estate Advisor

But it should create opportunities in the high grade corporate bond market in the meantime.

FORBES: Don't Like Treasuries Right Now? Try Corporate Bonds

Even junk issues have been inhaled by investors desperate for any yield pick-up over puny Treasury and high-grade bond yields.

FORBES: Bank Earnings Will Show the Way for Stocks