ETF activity on Tuesday, Oct. 13, showed a clear tilt toward growth and small-cap exposure, with 291 ETFs reporting and 32,940 positions increased against 17,318 decreased. Invesco QQQ Trust (QQQ) attracted the largest estimated inflow at $6.35 billion, followed by iShares Russell 2000 ETF (IWM) at $984.3 million and iShares Russell 1000 Growth ETF (IWF) at $875.4 million. On the outflow side, SPDR S&P 500 ETF Trust (SPY) led with an estimated $1.40 billion withdrawal, while Financial Select Sector SPDR (XLF) and Consumer Staples Select Sector SPDR (XLP) saw estimated outflows of $726.3 million and $682.4 million, respectively. The net estimated flow across all reporting ETFs was $6.94 billion.

The largest estimated inflows were QQQ ($6.35 billion), IWM ($984.3 million) and IWF ($875.4 million).

The largest estimated outflows were SPY ($1.40 billion), XLF ($726.3 million) and XLP ($682.4 million).

ETFs added the most dollar value in NVDA ($757.0 million), AAPL ($522.2 million) and MSFT ($419.4 million).

ETFs cut the most dollar value from MDT ($222.5 million), BRK.B ($105.5 million) and JPM ($84.8 million).

The day's top ETF buy, NVDA, has more on its stock summary and GF Value pages.

Tomorrow, watch whether the growth-oriented inflows into QQQ and IWM persist or reverse, and whether the defensive-sector outflows from XLP and XLF continue.

Flows are estimated from the dollar value of each fund's reported holdings changes for Oct. 13, 2026.

Looking for a fund? Use the ETF Screener, and follow daily fund activity on the ETF Trends page.

This stock alert was generated using automated technology and GuruFocus financial data to provide readers with timely and accurate market reporting. This content was reviewed by GuruFocus editorial team prior to publication. Please send any questions or comments about this story to [email protected].

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