Stock fund investors invested a net $1.39 billion into funds in the week ended Wednesday, according to research firm AMG Data Services.

It was a particularly lucrative week for small-cap growth funds, the Arcata, Calif.-based firm said, as those funds drew in $622 million. Aggressive growth funds vacuumed in $490 million.

But international equity funds suffered, spitting out $78 million in outflows.

Still, AMG noted that this is the fourth straight week that stock funds had inflows.

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