What do funds, pensions and hedge funds do?

"Institutions" is a crowd, not a character. Let's split it into the four types you'll meet in headlines, each with a different job, timescale and effect on prices.

The four institutional characters

• Pension funds & insurers. The marathon runners. They manage retirement savings and policy reserves — enormous sums invested over decades. They prize stability, diversify heavily, and rebalance on schedules. Their flows are slow, huge and predictable.
• Mutual funds & index funds. The collectors. They pool money from ordinary savers and invest it according to a mandate — either a manager's judgment (active) or an index list (passive). When savers deposit or withdraw en masse, these funds must buy or sell almost mechanically.
• Hedge funds. The opportunists (in the neutral sense). Lightly restricted pools for qualified investors that can bet on rises AND falls, use leverage and derivatives, and move fast. They're a small slice of total assets but a loud slice of daily trading — and of financial news drama.
• Banks & brokers' trading desks. The plumbers. Much of their trading isn't opinion at all — it's facilitating client orders, hedging exposures and keeping markets flowing.

How big the collectors have become

The index funds deserve a number, because their size changed how prices behave. In 2019 the money in US index-tracking stock funds passed the money in actively managed ones for the first time, and it has kept growing since. Three managers — BlackRock, Vanguard and State Street — are together the largest shareholder in nearly nine out of ten S&P 500 companies (Fichtner, Heemskerk and Garcia-Bernardo, 2017). None of them chose those companies; the list did. That is why an index addition is an event with a date on it: funds tracking the index need the new name in the portfolio by the effective date, most of them buying near that day's close so their tracking stays tight, while the largest spread the buying across the days before and after to limit their own footprint — and none of it depends on what anyone thinks of the business.

One event, four reactions

Imagine a surprise interest-rate hike. The pension fund shrugs — its horizon is 2050. The index fund does nothing until its list changes. Hedge funds reposition within minutes, some winning, some losing. Bank desks absorb the order flow storm. Same news, four different behaviors — and the price you see is the sum of all of them.

That's why "the market reacted" is always shorthand. There is no single mind; there's an ecosystem.

Try it now

1. Look at who owns a company: its largest institutional holders, each with the number of shares held and its share of the company. Apple's three largest are below; for your own anchor company, open its holders in the Terminal and change the symbol there.

Open AAPL.US — holders in the EODHD Terminal

2. Classify the top five by name: which are index managers, which are active funds, which is pension money? The fourth and fifth are below the three above. You are looking at the ecosystem from the previous lesson, with names attached.

3. Get the scale of the whole thing in one line: the percentage held by institutions and the percentage held by insiders. Subtract both from 100 and you have roughly the share of the company owned by everyone else — including you. Apple's:

4. Question to carry: if most of the top holders are index funds, what happens to their demand when your company enters or leaves a major index? Hold that thought — Unit 3 answers it.