They are supposed to provide insurance against default to bondholders.

它们理应向债券持有人提供违约风险保险。

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It is among only a handful of financial assets that can provide insurance against extreme movements in the value of traditional asset classes in times of instability, he says.

他说，在传统类别的资产价值处于激烈动荡时期，只有黄金和一些为数不多的金融资产能不受这些激烈动荡的影响。

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Insurance can be purchased to provide protection against such risks.

买保险可以应对此类风险。

《柯林斯英汉双解大词典》

Insurance Against Noncompliance: SDI will provide essential insurance against Soviet noncompliance with START or full-scale breakout from the ABM Treaty as well as against potential third country missile threats.

CENTERFORSECURITYPOLICY: Center for Security Policy | An Assessment Of Future Requirements For US Strategic Forces And Strategic Arms Control

Taxing away some of the return to capital to provide social insurance against risks is appropriate.

ECONOMIST: Free exchange

The FOMC will be carefully evaluating incoming information bearing on the economic outlook and will act in a timely manner as needed to support growth and to provide adequate insurance against downside risks.

NPR: Economic Swoon to Continue, Bernanke Says