Currency overlay
What is Currency overlay?
A currency overlay is a separately managed program that hedges or actively manages FX exposure independently from underlying asset-manager decisions.
Overlay reporting should reconcile notional positions with underlying exposures and separate strategic hedging, active views, cash-flow trades, and unintended residuals. Performance must be assessed against the documented hedge benchmark after spreads, carry, fees, collateral, and interactions with external managers.
Mandates should define authority, netting, counterparty limits, benchmarks, and coordination with cash management.
Operational reporting should identify stale exposures, manual adjustments, failed rolls, disputed valuations, and collateral exceptions. The overlay manager's notional can exceed net portfolio currency exposure when hedges overlap, dates mismatch, or active positions sit beside passive protection.
Why use an overlay
A multi-manager portfolio can accumulate currency exposures that are difficult to coordinate. An overlay aggregates them and implements a central hedge or active policy, potentially reducing duplication, cost, and unintended risk. The underlying assets remain with their managers, while the overlay trades forwards, futures, options, swaps, or cash currencies.
Passive and active approaches
A passive overlay maintains strategic hedge ratios within tolerances. An active overlay deviates based on valuation, carry, momentum, risk, or discretionary views, seeking return or improved risk. Dynamic hedging changes ratios with market or funded status. Objectives and benchmarks must distinguish cost-effective implementation from active currency skill.
Exposure measurement
The program needs timely holdings, cash flows, benchmarks, subscriptions, redemptions, and derivative positions across managers. Stale data can over- or underhedge after market moves. Security denomination is only a starting point; funds, multinational companies, debt, and liabilities may require look-through or policy-based proxies with disclosed limitations.
Liquidity and collateral
Forward gains and losses settle as cash and collateral may be required even when the combined economic portfolio is sound. The overlay needs a liquidity waterfall, netting, counterparty limits, legal agreements, and coordination with asset sales. Leverage and short-dated rolls can turn a risk-reduction mandate into a funding problem under stress.
Practical governance
Define base currency, exposure source, strategic ratios, active limit, benchmark, instruments, rebalancing, valuation, counterparty, collateral, cash authority, and reporting. Reconcile notionals and performance with custodians and managers. Evaluate local asset, structural currency, hedge, active return, carry, and cost. Avoid rewarding gains that merely offset underlying FX losses.
Sources and further reading
- Currency Management: An Introduction, CFA Institute