The S&P 500 closed Friday’s session in a precarious position after hitting its lowest close of 2026 earlier in the last week. However, heading into the Monday open, a wave of late-weekend optimism has shifted the narrative.

The Polygon-based (CRYPTO: POL) Polymarket crowd has turned decisively bullish for the March 16 open. The market currently reflects a 75% chance of an “Up” open, a 26% change in confidence over the last 24 hours. Early trading volume for this specific bet has reached $17,799.

Why That Number Matters

Geopolitical maneuvers are once again the primary driver of market sentiment. On Sunday evening, President Donald Trump increased pressure on global allies, warning NATO of a “very bad” future if they do not provide military assets—including minesweepers—to help reopen the Strait of Hormuz.

Trump also noted that China should contribute, given its heavy reliance on the route for oil. While the U.S. has already conducted strikes on Iranian military assets on Kharg Island, Trump clarified that energy facilities have been avoided thus far, though he warned they could be targeted “in five minutes” if tanker attacks continue.

This aggressive stance appears to be providing a floor for equities while slightly cooling the “fear premium” in energy.

As of early Monday, S&P 500 futures were up 34 points, or 0.51%. Meanwhile, WTI Crude futures increased 1.12% to $97.92 per barrel, retreating from a brief climb back above the $99.17 threshold. Brent Crude futures, on the other hand, were trading 1.57% higher at $104.76.

The Bull Case

Beyond the oil price gains, bulls are looking for a relief rally following last week's oversold conditions. The U.S. Dollar Index slipped 0.08% to 100.2830, providing a modest tailwind for multinational equities. Furthermore, the market is still digesting the recent PCE inflation report; any sign that the Fed has “room to act” remains a secondary catalyst for a rebound.

How The Previous Bet Played Out: The S&P 500 opened Thursday higher at 6,673.49. This followed a change in Polymarket sentiment from a lower opening probability to a higher opening probability in the last hour on Friday before the market opened.

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