US Stock Capital Flow · Institutional and Main Force Capital Tracking

Where the money goes, the price follows. We break down each day's US stock trades by "size of money" so you can see clearly whether it'sinstitutions (big money)that are moving, orretail investors (small orders)that are chasing.

What is US Stock Capital Flow

US stock capital flow is dividing each day's trades by single-trade amount into four tiers—extra-large orders, large orders, medium orders, small orders—then aggregating by direction (buy/sell). Institutions place large orders, usually falling into extra-large and large orders; retail funds are scattered, mostly falling into medium and small orders. By looking at the four tiers separately, you can distinguish "who is buying and who is selling."

What Data Dimensions We Provide

The daily report gives, per stock: ① net inflow of extra-large/large/medium/small orders; ② institutional total (extra-large + large) and retail total (medium + small); ③ institutional purity—the portion of institutional buying not offset by retail; ④ normalized purity—purity as a proportion of turnover, used for cross-comparison of stocks with different market caps; ⑤ volume deviation (volume expansion/contraction); ⑥ internal institutional consistency (whether there is divergence).

How to Read Capital Flow

Don't just look at "net inflow being positive." Look more at structure: institutions positive, retail negative usually meansinstitutional dominance; institutions and retail in the same direction means the direction is more confirmed; institutions positive but retail following in large amounts, on the contrary, warrants caution about whether retail is carrying the load. Combined with volume, volume expansion + institutional net buying has higher reference value than volume contraction.

Cross-Validation with Other Dimensions

Capital flow is the "lit market" perspective. Put it together withdark pool (off-exchange block trades),short selling ratio,options P/C ratio,market sentiment value: lit market buy + dark pool sell = directional conflict (distribution warning); lit market sell + dark pool buy = dark pool absorption; both buy = strong accumulation characteristic; both sell = strong distribution characteristic.

Frequently Asked Questions

Where can I see US stock capital flow data?
We generate a report after the US stock market close each trading day, automatically sent to your registered email, containing the capital flow breakdown of your watchlist stocks.
How are institutional funds and retail funds distinguished?
By single-trade amount tiers: extra-large + large orders are considered institutional, medium + small orders are considered retail. This is the industry-standard approximate caliber.
Is positive net inflow necessarily a good thing?
No. It should be viewed comprehensively in combination with institutional/retail structure, volume energy, dark pool and short selling, and other dimensions. Any single indicator can be misleading.
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Related data dimensions:US Stock Dark Pool DataUS Stock Short Selling RatioOptions P/C Ratiomarket sentiment value

This page only provides market data and capital flow presentation, and does not constitute any investment advice or buy/sell recommendation.