Bull market
What is Bull market?
A bull market is an extended period of broadly rising asset prices, usually accompanied by improving investor confidence.
Portfolio interfaces should avoid celebratory framing. Showing return alongside valuation, breadth, concentration, drawdown, and contribution helps users understand whether gains came from broad fundamental improvement or a small number of increasingly dominant positions.
Definition and convention
There is no single official threshold or duration that defines every bull market. Commentators often date an equity bull market from a prior bear-market low and use a 20% rise as a convention. Results change with index, currency, dividends, inflation, and closing versus intraday prices. A narrow rally in a few large securities may not represent broad market strength.
What can drive one
Bull markets can be supported by earnings growth, falling discount rates, improving credit, innovation, liquidity, or rising valuation multiples. Prices can also rise during weak current economic data when investors anticipate recovery. Later phases sometimes feature leverage, issuance, concentration, speculative participation, and narratives that detach prices from plausible cash flows, but those features do not provide a reliable timing rule.
Measuring the experience
Use total-return indexes when assessing investor wealth because price-only measures omit distributions. Report start and end dates, drawdowns within the advance, inflation, currency, and breadth. An investor's result also depends on cash-flow timing, tax, fees, and rebalancing. A market can remain in a long advance while individual sectors or securities suffer deep and permanent losses.
Portfolio implications
Rising markets can cause equity weights, factor exposures, and concentration to drift above policy targets. Rebalancing sells part of the appreciated exposure, while momentum strategies may intentionally retain it. Neither approach guarantees a better next return. Investors should connect the rule to objectives, taxes, costs, and risk capacity rather than adjust merely because financial media applies a bull-market label.
Risk discipline
Do not confuse recent gains with reduced risk or extrapolate an unusually high return indefinitely. Review valuation, leverage, liquidity, position size, and downside capacity while maintaining the strategic plan. Stress a correction and bear market before they occur. Avoid market-timing decisions based solely on round-number thresholds, which describe past price movement but do not reveal future return or a cause.
Sources and further reading
- What is a Bull or Bear Market?, Investor.gov, U.S. Securities and Exchange Commission