他们发现在所有这三种情况下，交易量与高波动正相关。

They find that in all three cases trading volume is positively correlated with higher volatility.

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我们预期食品价格高波动仍将持续一段时间，因此重启该方案说明，我们已准备好在有需要的情况下提供帮助。

We do expect high food price volatility to continue for some time, so reactivating the food crisis facility means we're ready to help if asked.

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然而，近几个月来期货市场的高波动性已经促使主要的期货交易所增加了保证金要求。

However, the higher volatility in futures markets in recent months has prompted the major futures exchanges to increase trading margin requirements.

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