Bloomberg reported U.S. regulations cracking down on the biggest buyers of leveraged loans are said to risk concentrating the debt into the hands of the largest firms while squeezing out smaller managers.

Bloomberg reported an industry-sponsored study conducted last year by consulting firm Oliver Wyman reveals almost a third of the 30 biggest managers of collateralized loan obligations may be unable to comply with rules requiring they retain at least a 5% stake in the deals they arrange.

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