Investors took about $3.4 billion out of equity mutual funds during the three business days ended March 22, estimates

TrimTabs.com

, a firm that tracks fund inflows and outflows.

For the most recent period, U.S. equity funds saw outflows of $3.6 billion. International funds, meanwhile, had inflows of $225 million, estimates TrimTabs.

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For the three days ended March 22, the

Nasdaq Composite Index

fell 2.7%, the

S&P 500

dropped 4.6% and the

Dow

slumped 5.7%.