(Bloomberg) -- The SEC is set to propose a requirement thatmutual-fund companies report how vulnerable their bond portfolios are to interest-rate changes, two people familiar with the matter said.

The proposal, which the five-member commission is scheduled to vote on Wednesday, is among the agency’s first moves to address regulators’ concerns that many bond funds could face steep losses if the Federal Reserve’s first interest-rate hike in almost seven years forces them to sell assets quickly.

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