The ECB's interest rate decision directly determines the yield of the Euro, which has a very high weight (approx. 57%) in the US Dollar Index (DXY); thus, an unexpected rate move would significantly impact the DXY. Additionally, as a major global central bank, its policies spill over via exchange rates and global bond yields, affecting Gold prices and sentiment in global risk assets (like the S&P 500), although the direct impact on US equities is usually weaker than that of a Fed decision.

April 27, 2026 - April 28, 2026, the price of '25 bps Increase' surged from 57.5c to 79.5c, while 'No change' plummeted from 41.5c to 14.5c. The reason is strong stickiness in late-April European economic and inflation data, prompting a rapid market sell-off of pause expectations and an all-in bet on a June rate hike. April 16, 2026 - April 18, 2026, the price of '25 bps Increase' rebounded sharply from 25.5c to 38.5c, while 'No change' surged from 57c on Apr 16 to 68c on Apr 17 before pulling back slightly. The reason is mixed macroeconomic signals in April; signs of slowing economic growth counteracted previous inflation fears, leading markets to heavily reprice an ECB pause (No change), though sticky inflation continued to drive high volatility. March 19, 2026 - March 20, 2026, the price of '25 bps Increase' surged from lows (approx. 20c) to 61c, while 'No change' plummeted. The reason is the ECB's March meeting, where despite holding rates, they significantly raised inflation forecasts, leading major banks like J.P. Morgan and Barclays to issue new calls for rate hikes in April or June due to the energy crisis.