Equity Fund Inflows Hit $37.6B as AI Optimism Returns

US equity fund inflows just hit their highest weekly level in more than three months. Investors bought $37.6 billion of US equity funds on a net basis in the week ended September 25, according to Reuters citing LSEG Lipper data, the largest weekly net purchase since June 17. Renewed excitement around artificial intelligence pulled money back into large-cap technology, where a broader tech rally and strong consumer demand for AI products gave buyers a reason to come back after weeks of selling.

For younger investors, the timing is interesting. Gen Z has been the most AI-obsessed investing generation for a while now, with survey data showing far higher AI stock ownership among twenty-somethings than among their parents. This week's equity fund inflows suggest the rest of the market is finally catching up to a trade that young investors were already in.

Beneath that, this week's equity fund inflows were concentrated squarely in the biggest names. Large-cap equity funds drew $36.62 billion, the biggest weekly inflow since June 24, while multi-cap funds added $395 million. Mid-cap funds saw $372 million walk out the door and small-cap funds lost $1.02 billion, so the buying skewed heavily toward mega-cap stocks. Technology sector funds pulled in $4.89 billion, their strongest week since July 29. Consumer discretionary funds added $515 million, while investors pulled $2.53 billion from financial sector funds.

Bonds got some love too. The return of equity fund inflows in force is a sharp turn from the previous five weeks of selling. US bond fund inflows jumped to $5.93 billion for the week, up from roughly $562 million the week before. Investors bought $4.15 billion of general domestic taxable fixed-income funds, the biggest weekly purchase since June 3. Money market funds attracted about $11 billion, ending a two-week outflow streak, which suggests plenty of cash is still sitting on the sidelines rather than chasing the rally.

What reignited the AI trade

Reuters reported that demand for funds investing in large-cap technology companies was strong, driven by the broader tech rally and strong consumer adoption of Meta's Muse agent, which topped US app-download rankings. Oil prices retreated from recent highs, which gave risk appetite room to breathe. Falling energy costs and visible AI demand combined to make growth stocks look attractive again, and equity fund inflows followed the same logic across the tech sector.

There was a real counterweight, though. The 30-year Treasury yield surged to 5.5016% on Thursday, a 22-year high, as expectations mounted that the Federal Reserve would keep tightening policy. That spike tempered investors' risk appetite even as money flowed into equities. When long-term yields sit that high, safe government debt starts competing with stocks for investor dollars, and it explains why nearly $11 billion still landed in money market funds despite the equity comeback.

Why Gen Z was already there

The Motley Fool's 2026 Generational Investing Trends Survey helps explain who was buying before this week. It found that 68% of Gen Z investors own AI stocks, compared with 65% of millennials, 48% of Gen X and just 38% of baby boomers, as reported by the firm's research team. Only 10% of Gen Z say they have no plans to invest in AI stocks at all. That appetite lines up with the Gen Z ETF investing playbook covered on this site: steady index funds over meme trades. Among Gen Z and millennial AI stock owners, 41% and 43% respectively describe themselves as long-term holders planning to stay in for ten years or more. The Motley Fool's generational survey has more on the divide.

A separate Motley Fool outlook report found that 68% of Gen Z investors plan to increase their stock positions in 2026, versus 46% of Gen X and 39% of boomers, according to the firm's 2026 investor outlook. AI optimism is the engine: 73% of millennials foresee strong returns from AI over the next decade, and younger investors are picking up dividend strategies on YouTube and TikTok as a side income stream. The equity fund inflow data now shows retail and institutional money moving in the same direction the youngest generation was already pointing, which could make the buy-the-dip debate more urgent than ever.

The question now is whether the rebound has staying power. Yields at a 22-year high and the prospect of more Fed tightening remain a drag on riskier bets, and the fact that cash-like money market funds still drew billions shows plenty of investors hedged rather than committed. But for now, the tide has turned: tech funds just had their best week in nearly two months, and equity fund inflows resumed at their fastest pace since mid-June. The Bitcoin ETF boom already showed young investors chasing new vehicles, and now mainstream funds are following the same AI signal. Gen Z investors who loaded up on AI stocks early have some new company. Reuters has the full breakdown of this week's fund flows.