Pound Sterling Surges on US Treasury Announcements

The British Pound Sterling has been on an unexpected rise, reaching a five-month high against the US Dollar. The GBP/USD traded at around $1.3700, roughly four cents above its early-August low. Despite there being no significant economic data from the UK this week, the Pound has managed to hold its ground.

The main catalyst behind this rally is believed to be the recent announcements by the US Treasury. On August 19, it was announced that the department would at least double the size of its long-dated buyback operations from September 9. This move has pushed the US Dollar down around 2.5% over the past month on a trade-weighted basis.

The Bank of England's decision to keep interest rates unchanged since July and the lack of economic data from the UK this week have also contributed to the Pound's strength. The UK's ten-year gilt yields are currently above 5%, roughly a third of a percentage point more than the American paper being sold over debt sustainability.

However, analysts warn that the Pound's rally may be short-lived if the Federal Reserve decides to raise interest rates before year-end, which is still priced in by futures markets. A daily close below $1.3550 could turn the market bearish, with the 50-day Exponential Moving Average near $1.3450 as a potential magnet.