Currency overlay

Currency overlay is a financial trading strategy or method conducted by specialist firms who manage the currency exposures of large clients, typically institutions such as pension funds, endowments and corporate entities. Typically the institution will have a pre-existing exposure to foreign currencies, and will be seeking to:

The currency overlay manager will conduct foreign-exchange hedging on their behalf, selectively placing and removing hedges to achieve the objectives of the client.

Many types of currency overlay accounts are more focused on the speculative aspect, i.e. profiting from currency movements. These so-called 'pure alpha mandates' are set up to allow the manager as much scope as possible to take speculative positions. As such, they are similar in nature to foreign-exchange hedge funds in terms of objective and trading style. Currency overlay is a relatively new area of finance; the first institutional overlay mandate was awarded only in 1983 when the UK water Authorities Superannuation Fund awarded a contract to Record Currency Management.

Individuals and institutions who own equities, government bonds, cash, or other assets denominated in foreign currencies are exposed to fluctuations in the foreign exchange market. This is an unrewarded risk: the volatility in valuation of an international portfolio is generally increased by adding currency exposure, yet there is no risk premium earned for that added volatility in the long term. Thus investors with international portfolios often hedge their currency risk, normally using forward currency contracts, currency swaps, currency futures contracts, or currency options.

Currency hedging can be done passively or actively. The stream of returns from passive currency overlay is negatively correlated with international equities, has an expected return of zero, and does not employ any capital. The overlay manager uses forward contracts to match the portfolio’s currency exposures in such a way as to insure against exchange rate fluctuations. A decision list for a passive overlay manager would include

The decisions will be informed by, among other things,

Active currency overlay requires management style decisions on the part of the manager, based on the types of model and model input that the manager chooses to employ. While these decisions are often real-time, some providers develop pre-defined rule based strategies. The most common categories in active currency overlay are as follows:

Fundamental managers believe they can exploit price inefficiencies using models and processes in which economic and financial data are used as the ‘exogenous’ variables, including balance of payments, capital flows, price levels, monetary conditions, etc. Millennium Global Investments is one of the most well established fundamental discretionary currency overlay managers in the investment industry.

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