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FX Swaps: The Largest Part of the Market You Never See

Retail traders think of forex as spot trading. In terms of volume, spot is only a part, and the largest share involves instruments most people never use.

The Bank for International Settlements surveys show that FX swaps, contracts that exchange currencies now and reverse the exchange at a future date, account for the largest share of daily turnover, more than spot itself. Forwards, options, and currency swaps make up the rest.

Why are FX swaps so large? Banks and corporations use them for funding and hedging. A bank needing dollars can borrow them by swapping its own currency, returning the dollars later. An investor holding foreign assets can hedge currency risk by rolling forward contracts.

This means that a significant part of daily turnover reflects financing needs, not speculation about exchange rate direction.

For traders, it has several implications. Funding conditions can move currencies, as when demand for dollar funding rises and the dollar strengthens. Quarter-end pressures often show up in swap markets before spot. And headline turnover figures overstate how much of the activity is directional trading.

Spot remains the focus of retail trading because it is simple, and the instruments available are standardized.

Awareness of the broader market helps you interpret odd moves, which may stem from funding flows more than from views on currency values.

Practical step: look up the latest BIS Triennial Survey and note the share of each instrument in daily turnover.

Kind of humbling to see the BIS numbers. All the spot trading we obsess over is a slice of a market that's mostly about funding and hedging. It's worth keeping in mind when you read a chart. A lot of the flows behind a move have nothing to do with anyone's opinion about the currency. A Japanese insurer hedging foreign bonds, a European company paying for imports in dollars, a bank rolling its funding. None of them care about your order block. Most of the time that just shows up as background noise. But it explains why price sometimes moves strongly through technical levels on days with no news, especially around month end and quarter end.

This is part of why some moves near quarter end look strange on the spot chart. The pressure is often coming from the funding side, not from anyone's view on the currency. Banks tidy up their balance sheets ahead of reporting dates, demand for dollar funding rises, and that can move the dollar in the last few days of March, June, September and December. Some of it reverses in the first days of the new quarter. I wouldn't build a strategy around it, but I do treat those final days with extra care. Wider stops or smaller size, and less trust in breakouts that happen on thin, end of period flows.