Retail Investors Pile Back Into AI Trade, Net Buying $9.1 Billion in a Single Week
nashnova research
Citadel Securities data shows retail investors net-bought $9.1 billion in U.S. equities last week — the largest single-week haul in 15 weeks — with capital heavily concentrated in AI and semiconductor names. The driver is conviction, not volume.
How big is $9.1 billion in context?
Retail investors net-bought $9.1 billion in U.S. stocks through Citadel Securities last week — the largest single-week inflow in 15 weeks.
This means → retail is not nibbling; it is buying at near-quarterly-peak intensity.
The destination is narrow: AI-related stocks and ETFs absorbed the bulk of the flow.
More buying — but not more trading?
Citadel's head of equity and derivatives strategy, Scott Rubner, noted the surge reflects "stronger directional conviction, not a broader pick-up in volume."
Buy volume exceeded sell volume by 2.7%, placing directional skew at the 90th percentile over the past year — meaning only 10% of weeks were more buy-heavy.
Yet overall trading activity sat at just the 42nd percentile — below average.
In plain terms = fewer people are trading, but those who are trading are buying hard and barely selling.
Where exactly is the money going?
Semiconductors drew $2.6 billion in net buying last week — the third-highest weekly figure in a year. At this pace, October could become the biggest month for retail chip-stock purchases on the platform.
AI infrastructure attracted roughly $2.4 billion over the same period.
This reflects a striking conviction gap: chip stocks were under pressure from fears over Chinese memory-chip competition, yet retail bought into the dip rather than joining the sell-off.
Did retail time its re-entry well?
The Nasdaq 100 and S&P 500 both hit all-time highs last week, coinciding with the retail inflow.
Rubner had called this re-entry in early October, arguing that earnings season and the reopening of corporate buyback windows would give retail a "reload" opportunity — a call now confirmed by the data.
This means → the re-entry is not blind chasing; retail caught the earnings-season rhythm. Whether the directional bet pays off through actual results is the key test for the durability of the AI trade.
市场有风险，内容仅供研究参考，不构成投资建议。