Futures for major US equity indices climbed during European trading hours on Wednesday, driven by optimism over a potential agreement between the US and Iran to reopen the strategic Strait of Hormuz. According to FX Street, Dow Jones futures increased by 0.23%, reaching approximately 54,390.

S&P 500 futures saw a stronger gain, advancing 0.34% to trade near 7,790, while Nasdaq 100 futures rose 0.14%, hovering around 29,900. These moves reflect investor sentiment improving amid geopolitical developments.

For Japanese markets, these shifts in US futures are closely watched as they can influence risk appetite and currency flows, especially given Japan's strong trade ties and sensitivity to energy supply routes like the Strait of Hormuz.