Starting Out · Lesson 4
Risk and return
Why prices swing — and why holding through the swings costs less than reacting to them.
8 min read
Stocks earn more than savings accounts over the long run. That extra return isn't free. The price paid for it is that stock prices swing — sometimes hard, sometimes for years. The swings aren't a glitch in the system; they're what the higher return costs.
A drawdown isn't a permanent loss
The most important thing to know about a stock-market drop is that it's a temporary mark, not a permanent loss — as long as nobody sells. A drawdown is the gap between a recent high and the current price. The portfolio's number is lower; the shares it owns are the same shares.
A portfolio that drops 38% in a year and recovers four years later didn't lose 38% of its value. It took a four-year detour. The holder still owns the same fractional piece of the same companies. Those companies kept earning, kept paying dividends, kept making things. The price moved around the value; the value didn't move the same way.
What turns a temporary drop into a permanent loss is selling during the drop. The seller locks in the dip. The holder waits.
Two real drops, two real recoveries
The US stock market lost about 38% in 2008–09. It took roughly four years to recover. It also lost about 34% in early 2020 — that one recovered in five months. Different recovery times, same pattern: drop, hold, recover.
A visitor who held a broad-market portfolio through 2008 watched the account drop by more than a third, then fully restore. Nothing about the holding changed — they still owned shares in a few thousand companies, and those companies kept earning. A visitor who sold near the bottom turned a temporary price move into a real loss they never made back.
What "average returns" actually means
When this stage says stocks earn about 7% real a year on average, that's the long-term average — not what happens every year. In any single year, a broad stock portfolio can land anywhere from a 40% drop to a 40% gain. The long-term average is what emerges from many bad years and many good years averaging out.
The average comes out of a wide range. Each year is somewhere in the range; the average shows up over decades.
What matters is the gap between year-to-year (the size of the swings) and the long-term average:
- Short horizons (1–5 years): the swings dominate. What the portfolio is worth at year 3 is mostly luck.
- Long horizons (15–30 years): the average dominates. The swings still happen, but they cancel out over time.
The longer the holding period, the less the swings matter for the final outcome. Time is what turns "this year is a coin flip" into "the long-term average shows up."
Two reactions to the same drop
Sam watches the portfolio drop 30% in three months. Sam panics, sells most of it for cash, and waits for things to "feel safe again." By the time the market has clearly recovered six months later, Sam has missed about 25% of the rebound. The cash earned 1%. Sam's locked-in loss is about 22% — a real loss, never made back.
Alex sees the same 30% drop and does nothing. Alex stops checking the daily prices for a few months. When the market recovers six months later, Alex's portfolio is back where it was. The drop happened; Alex held; the recovery showed up.
Same starting portfolio, same market, very different ending positions. The difference wasn't in the market or the portfolio — it was in the reaction.
Further reading
- Stocks for the Long Run — Jeremy Siegel. Two centuries of US stock data. Documents the long-term return of stocks and the swings around it; one of the standard references on holding through drops.
- The Behavior Gap — Carl Richards. Short essays on why investors lose returns to their own reactions during drops. Closely matches this lesson's framing.