Despite efforts by regulators and banks to improve underwriting of commercial leveraged loans, the number of troubled large syndicated credits jumped again this year, according to a report released Friday by federal regulators.

The 2016 Shared National Credit Review found that 10.3% of such loans — business loans totaling more than $20 million that are shared by at least three institutions — had weaknesses, a jump from 9.5% a year ago. Overall, troubled credits rose 13% to $421.4 billion.

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