How much an asset's price swings around its average. Usually measured by standard deviation of returns. Higher volatility = wider possible outcomes.
Volatility is a statistical measure of how much an asset's price swings around its average. Higher volatility = wider range of possible outcomes.
Standard deviation of returns is the most common volatility measure. Annualised volatility of 15% means returns typically fall within ±15% of the mean in any year.
Cash / FD: ~0% (effectively zero volatility).
Investment-grade bonds: 3% – 6% annual volatility.
Broad equity indexes (S&P 500, MSCI World): 15% – 18% long-run annual volatility.
Single emerging-market stock: 30% – 50%+.
Crypto / Bitcoin: 60% – 100%+ annualised.
Sequence of returns risk: in retirement, withdrawing from a high-volatility portfolio during a drawdown can permanently damage the portfolio. Two retirees with the same average return but different volatility outcomes can end up wealth-apart.
Risk-adjusted return: Sharpe ratio normalises returns by volatility. A 10% return with 20% volatility may be inferior to a 7% return with 8% volatility on a risk-adjusted basis.
Emotional cost: volatility tests your discipline. Investors often sell at the bottom and buy at the top — destroying returns. Lower volatility makes a portfolio easier to stick with.
Diversification: combining stocks with bonds reduces aggregate volatility more than the average of the two — because they don't move together perfectly.
Time: longer holding periods reduce the spread of annualised outcomes. A 30-year average S&P 500 return is almost always positive; a single-year return varies wildly.
Volatility ≠ risk: volatility is the math of price movement. Real risk is permanent loss of capital. A volatile but recoverable holding is different from a steady stream that quietly slides toward zero.
A statistical measure of how much an asset's price swings around its average. Typically annualised standard deviation of returns. Higher volatility = wider range of possible outcomes. Cash: ~0%. Investment-grade bonds: 3% – 6%. Broad equities: 15% – 18%. Bitcoin: 60% – 100%+.
Three reasons. Sequence-of-returns risk in retirement (bad early years can permanently damage a portfolio). Risk-adjusted return comparison (Sharpe ratio). Behavioural — high-volatility holdings test your discipline; many investors panic-sell at bottoms.
No. Higher long-run returns typically come with higher volatility — that's the risk premium. Young accumulators with long horizons can absorb equity volatility for higher growth. Near-retirement and retired investors should lean toward lower-volatility allocations.
Diversify across asset classes (stocks + bonds + cash) and geographies (global vs single-country). Add inflation-linked assets. Avoid concentrated bets. CPF (4% guaranteed on SA / MA / RA) acts as a low-volatility anchor for Singapore investors.