SAN FRANCISCO - In a sign that the Securities and Exchange Commission may have a struggle on its hands as it seeks to open up disclosure policies among U.S. corporations, Wells Fargo & Co. has called an end to quarterly investor conference calls, citing the SEC's proposals as the reason.

The San Francisco-based banking company discontinued the calls "to ensure we continue to comply with SEC disclosure requirements," spokesman Larry Haeg said Monday. Wells Fargo is mulling other methods of issuing earnings information, including prerecorded messages from senior executives, Mr. Haeg said.

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