Money market mutual funds are expected to all participate in the Treasury Department's temporary guaranty program, which will cover investors' assets in the funds as of the end of Sept. 19, analysts said.

The 20 largest money market mutual funds by assets have applied for insurance protection, according to Peter Crane, president and chief executive officer of Crane Data LLC. He said he expects all money market fund parent companies will have applied for insurance by the 11:59 p.m. Eastern Daylight Time deadline last night.

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