(Bloomberg) -- Low-volatility ETFs amassed billions of inflows in the first half of the year, as major political risks like the U.K. referendum and the U.S. election scared some investors off higher-yielding investments.

But in the latest sign that they've fallen out of favor, the iShares Edge MSCI Min Vol EAFE ETF saw record one-day outflows of more than $300 million on Wednesday.

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