WASHINGTON — Sens. Sherrod Brown, D-Ohio, and David Vitter, R-La., continued to press their case over "too big to fail" on Thursday, in the wake of a new government report that raises fresh questions about the size of a market subsidy for the largest institutions.

The Government Accountability Office study presents a mixed picture on whether investor perception favors big banks due to the assumption that the government would again bail out a major financial institution in a crisis. The report, released Thursday afternoon, suggests that any subsidy the biggest banks receive has declined or even reversed since the financial crisis — though researchers also warn that the trend could again shift in a more challenging economy.

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