NVIDIA be the largest company in the world by market cap on October 31, 2026 priced at 77.2% on Polymarket

NVIDIA’s probability of being the world’s largest company by market capitalization on October 31, 2026 was priced at 77.2% on Polymarket, down 4.6 probability points over 24 hours. The move came with $163K traded, placing the contract among the finance board’s declining markets.

Lower odds, but still above 50%

The October 18 update showed traders assigning a lower probability to NVIDIA finishing at the top of the market-cap ranking on the specified date. Even after the decline, the contract’s price remained well above 50%.

The supplied material does not identify a company announcement, stock-market development or other catalyst for the change. It documents a shift in pricing, rather than explaining why traders reassessed the outcome.

Reading the mover data

According to predictionbubbles.net, its movers board compares probabilities over 24 hours, using prices from Polymarket and Kalshi and refreshing every 15 minutes. The supplied source snapshot records a venue-data read at 18 Oct 2026, 20:42 UTC.

The board ranks changes by their absolute size in probability points, not by relative percentage changes or trading volume. The 4.6-point decline therefore describes the change in the contract’s implied probability; it is not a measure of NVIDIA’s share-price performance.

The $163K trading figure provides activity context, but does not establish order-book depth or explain the repricing. According to predictionbubbles.net, volume does not affect a market’s position in its movement rankings.

What it means for prediction markets

• The outcome remains priced above 50%. At 77.2%, the market still assigns a higher probability to NVIDIA holding the top market-cap position on October 31, 2026 than to it not doing so.
• Direction and level tell different stories. The 4.6-point decline indicates reduced market-implied confidence, despite the relatively high remaining probability.
• The catalyst is unresolved. Neither the trading figure nor the price change alone establishes whether the move reflects new information, trading conditions or a reassessment by participants.