The Securities and Exchange Commission’s latest probe into Massachusetts Financial Services centers on its financial arrangements with several top brokerage houses, the company has admitted in a filing with the Commission.

MFS’s said in the filing it has "been under investigation by the SEC relating to its directed brokerage and revenue-sharing arrangements with various distributors of its products, including Morgan Stanley." The SEC is looking into whether the company received payments from brokerages whose stocks were held within MFS mutual funds.

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