Oil prices are jumping again. How the S&P 500 has performed on days crude has seen big gains may be surprising.

Oil prices are once again posting sharp gains, reviving a question investors frequently ask: does a crude rally necessarily weigh on equities? The historical record on days when oil has risen 3% or more suggests the relationship is not as straightforward as intuition might imply.

For the S&P 500, such sessions have not consistently produced losses. The index has, at times, moved higher alongside crude, reflecting the fact that energy companies represent a meaningful slice of the benchmark. When oil climbs, those constituents can act as a partial offset to pressure elsewhere in the market.

That nuance matters for how investors interpret headlines linking energy and stocks. The takeaway is not that oil strength is bullish or bearish for equities, but that the two markets respond to a mix of shared and distinct drivers. What to watch: whether a crude move stems from supply disruptions, demand shifts, or broader risk sentiment — context that often determines how equities absorb the same price change.