The S&P 500 is indicating a strong open, building on the previous session's rally. The primary catalyst is a significant de-escalation in geopolitical tensions between the US and Iran, which has led to a drop in oil prices. This has improved investor sentiment and is coupled with a rebound in the technology sector and positive signals on economic growth and inflation. The current upward movement reflects a broad market rally as investors embrace a more "risk-on" stance.