It is likely that these and other countries have sought to secure supplies by buying wheat futures too, though the opacity of that market makes buyers' identities unclear.

好像这些国家通过购买更多粮食以保障供应，不过这使得这种黑市上的买家身份不详。

youdao

The Shariah black box is yet another financial fad like the sub-prime market where transparency is shrouded in opacity in the mad rush to market-share and quick profits.

CENTERFORSECURITYPOLICY: Shariah��s Black Box

Criticism about SharesPost and SecondMarket have focused on the lack of regulation and opacity behind these market-makers.

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It was just this kind of opacity that created the dislocations in market prices that made stock investing so lucrative for some.

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