Risk & Money ManagementRisk Spreading
Diversification
Spreading capital across instruments or strategies whose returns are imperfectly correlated in order to lower portfolio risk.
What Diversification means
Diversification works because the volatility of a combined portfolio depends not only on the volatility of its components but on how they move relative to one another. When two positions are less than perfectly correlated, the variability of the combination is lower than the weighted average of the parts, so a trader can hold the same total exposure with a smoother equity curve. The benefit grows as correlation falls and is greatest when components are genuinely uncorrelated or negatively correlated.
Currency trading makes real diversification unusually difficult, because most liquid pairs share a leg in the US dollar or the euro, so several positions frequently express one underlying view. Diversifying across strategies, timeframes and asset classes is often more effective than adding more pairs. The persistent caveat is that correlations are not constant: in periods of stress, positions that normally behave independently tend to move together, and the diversification benefit disappears precisely when it is most needed.
Worked example
Holding one lot of EUR/USD and one lot of GBP/USD is close to a single short-dollar bet, since the two pairs frequently correlate above 0.85 and the combined position behaves much like a two-lot exposure to the same idea.
Related terms
- CorrelationA statistical measure between -1 and +1 describing how closely the returns of two instruments move together.
- ExposureThe total market risk an account carries, measured by the aggregate notional value of its open positions.
- Risk Per TradeThe share of account equity a trader is prepared to lose on a single position, normally expressed as a percentage.
- Money ManagementThe set of rules governing how much capital is risked per trade, per day and across all open positions.
- VolatilityThe magnitude of price fluctuation over a period, usually measured as the standard deviation of returns or as an average range.
Frequently asked questions
What does Diversification mean in forex trading?
Spreading capital across instruments or strategies whose returns are imperfectly correlated in order to lower portfolio risk.
How does Diversification work in practice?
Currency trading makes real diversification unusually difficult, because most liquid pairs share a leg in the US dollar or the euro, so several positions frequently express one underlying view. Diversifying across strategies, timeframes and asset classes is often more effective than adding more pairs. The persistent caveat is that correlations are not constant: in periods of stress, positions that normally behave independently tend to move together, and the diversification benefit disappears precisely when it is most needed.
What is an example of Diversification?
Holding one lot of EUR/USD and one lot of GBP/USD is close to a single short-dollar bet, since the two pairs frequently correlate above 0.85 and the combined position behaves much like a two-lot exposure to the same idea.
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