A price is always a ratio
There is no such thing as the price of a pound. There is only the price of a pound in terms of something else. Every FX quote is a pair — GBP/USD at 1.27 means one pound buys 1.27 dollars — and every move has two possible explanations. Sterling weakness and dollar strength look identical on that chart and mean entirely different things.
This is why FX analysis is harder than it appears. You are always forecasting a relationship, and both sides move.
Why the market exists
Daily turnover runs into the trillions of dollars, and the overwhelming majority is not speculation. It is a German manufacturer paid in dollars converting to euros. It is a UK pension fund hedging the currency exposure of its US equity holdings. It is a bank funding a loan book in a currency it does not hold deposits in. Corporate hedging and portfolio flows dwarf the directional bets.
What moves it
Over long horizons, relative inflation and productivity. Over medium horizons, interest rate differentials — the carry trade, borrowing in a low-yielding currency to hold a high-yielding one, is one of the most persistent and most periodically catastrophic strategies in finance. Over short horizons, central bank communication, data surprises and positioning.
Sterling has its own well-documented habits: it is sensitive to UK political risk in a way that most developed currencies are not, and it tends to weaken in global risk-off episodes despite being a developed market currency.
The retail problem
FX is the most heavily marketed trading product to individuals, and the outcomes are consistently poor. Firms offering CFDs on currency to UK retail clients must publish the percentage of accounts losing money; the figures cluster between roughly 65% and 80%. That is not a market anomaly, it is arithmetic — spreads, overnight financing and leverage applied to a near-zero-sum game.
There is a real, useful currency market here. It mostly is not the one being advertised.
How you would actually trade it
For an actual currency need — buying a property abroad, paying an overseas invoice, emigrating — use a regulated payments specialist rather than a high street bank. The saving against a typical bank's retail FX margin is usually measured in whole percentage points, and on a six-figure transfer that is real money. Check the firm is FCA-authorised and ask whether client funds are safeguarded.
For investment purposes, the relevant question is usually whether to hedge currency exposure in an overseas portfolio, not whether to bet on currencies. Hedged and unhedged share classes of the same fund can diverge by tens of per cent over a decade.
For speculation, retail access is via CFDs and spread bets, where leverage is capped at 30:1 on major pairs for UK retail clients under FCA rules, with negative balance protection.
What goes wrong
- Leverage is the whole problem. At 30:1, a 3.3% move against you eliminates your capital. Major pairs move that much in a week routinely.
- Overnight financing charges accumulate on held positions and are a structural drag.
- Gap risk. The Swiss National Bank's 2015 removal of the euro peg moved EUR/CHF around 30% in minutes, leaving clients with debts exceeding their deposits and breaking at least one broker. Negative balance protection now exists for UK retail clients; it did not then.
- Unregulated offshore brokers are the single most common vector for retail trading fraud. Verify on the FCA register.
- A near-zero-sum game against participants with better information, better execution and no retail spread.
This entry describes how a market works. It is not a recommendation, a price forecast, or advice about whether this belongs anywhere near your money. How entries are written.