Look through the labels
An investor might follow five managers and still be concentrated in one market move. If every manager sells the same currency, buys gold during the same conditions or adds to losing positions, the portfolio can behave like one larger strategy when it matters most.
A useful exposure sheet
For each allocation, record the instruments, directional positions, approximate leverage and what tends to cause losses. Compare open exposure on the same dates. A return correlation calculated over quiet months can miss a common reaction to a sudden market move.
The important question is not only whether the strategies made money at different times. It is whether they can all lose together, and how much total account exposure that creates.
Stress a shared bad day
Consider an illustrative portfolio of three equal $3,000 allocations. If all three lose 15% in the same event, the combined loss is $1,350, or 15% of the $9,000 portfolio. Three manager names did not reduce that shared percentage loss.
Then consider operational concentration. Different strategies can still depend on the same broker, copying connection or payment route. Those are separate risks from the trading signals themselves.
What genuine variety would need
- Different market exposures or responses to the same move.
- No hidden dependence on the same loss-recovery technique.
- A combined exposure and loss limit, not just separate manager limits.
- Evidence from difficult overlapping periods, with open trades included.
Keep the conclusion modest
Diversification may reduce some concentration, but it cannot promise a maximum loss or positive return. Where holdings are hidden, the honest conclusion is that portfolio overlap cannot yet be assessed.
About this article
Original editorial explanation and illustrative arithmetic. No provider performance or personalised investment recommendation is presented.