Taiwan's three major institutional investors, explained
Last updated: 2026-07-03
Taiwan's "three major institutional investors" (三大法人) are foreign institutions (外資), domestic investment trusts / funds (投信), and dealers' proprietary desks (自營商). After each trading day's close, the Taiwan Stock Exchange (TWSE) and the Taiwan Futures Exchange (TAIFEX) publish their net buy/sell amounts and positions — this is identity data (who traded), delayed by design (T+1). Retail traders watch it to gauge institutional money, but it is a chip-analysis signal, not the same as real-time order flow. Descriptive, not investment advice.
Who are the three? Foreign investors, investment trusts, dealers
Foreign institutions (外資) are overseas funds, and are usually the largest and most trend-setting flow in Taiwan equities. Investment trusts (投信) are domestic fund managers; their buying is watched near quarter- and year-end for "window dressing" (作帳). Dealers (自營商) are brokerages trading their own book, often shorter-term and hedging-driven. Each behaves differently, so the total net figure matters less than which of the three is doing the buying or selling.
How to read net buy/sell: size, streaks and positions
"Net buy" (買超) means they bought more than they sold that day; "net sell" (賣超) is the reverse. Three things add context: the size relative to recent days; the streak — several consecutive days of the same direction says more than a single day; and futures positions — TAIFEX publishes the three investors' open interest in index futures, which can confirm or contradict their cash-market action. Broker-branch data (券商分點) adds finer detail on where orders cluster.
Institutional chips vs order flow / capital pressure
Chip analysis (籌碼), including the three investors' net figures, tells you who traded — identity data, published T+1 after the close by TWSE and TAIFEX. Order flow tells you how trades executed — aggressive buyers versus aggressive sellers, in real time, with no idea who is behind them. They are complements, not substitutes: chips tell you whose money moved yesterday; order flow (and See-Market's daily capital-pressure read) tells you which side is pressing now. See the fuller distinction in the order-flow guides.
Reading chips and capital pressure together on See-Market
See-Market does not republish the three investors' chip data; check TWSE / TAIFEX for that (free, official). What See-Market adds is a daily capital-pressure read on the TAIEX and 14 other markets — accumulation vs distribution derived from price and volume, graded in the open. Used together, the chip data gives you yesterday's institutional identity, and the pressure read gives you the current lean; when both point the same way the context is clearer. Watch the pressure board on the flow observatory. Not investment advice.
FAQ
Which three are the "three major institutional investors"?
Foreign institutions (外資), domestic investment trusts / funds (投信), and dealers' proprietary desks (自營商). The Taiwan Stock Exchange and Taiwan Futures Exchange report each one's net buy/sell separately after the close.
If foreign investors net-buy, will the market definitely go up?
No. A foreign net-buy is context, not a guarantee. The data is delayed (T+1), foreign flows can reverse quickly, and much of the buying can be index-arbitrage or hedging rather than a directional bet. Treat it as one input among many, not a signal. Not investment advice.
Where can I check the three investors' net buy/sell?
For free from the official sources: the Taiwan Stock Exchange (TWSE) publishes daily cash-market net buy/sell after the close, and the Taiwan Futures Exchange (TAIFEX) publishes the three investors' futures and options positions. Many broker apps and data sites repackage the same official numbers.
What is investment-trust "window dressing" (投信作帳)?
It is a widely-watched seasonal pattern where domestic investment trusts (投信) tend to buy up stocks they already hold near quarter-end or year-end, which can lift their reported fund performance. It is a tendency traders talk about, not a rule — and like all chip signals it is descriptive, not a promise. Not investment advice.
Is the three investors' data the same as "chip analysis"?
The three investors' net buy/sell is a core part of chip analysis (籌碼分析), which also includes broker-branch data (券商分點), margin balances and shareholding concentration. "Main force" (主力) is an informal term for large players inferred from these signals — not an official category.
How is chip data different from order flow?
Chip data is identity, published T+1 — who traded yesterday. Order flow is execution, in real time — which side was the aggressor right now, without knowing who. Taiwan's exchanges publish rich chip data but not tick-level aggressor data at the same granularity, which is why See-Market shows an AI-derived capital-pressure read for the TAIEX rather than true order flow (real order flow is shown only for crypto). They complement each other.
Not investment advice. Institutional net buy/sell is descriptive, delayed (T+1) chip data — context, not a buy or sell signal, and no single institution's flow guarantees a market move. Official data: Taiwan Stock Exchange (TWSE) and Taiwan Futures Exchange (TAIFEX).