Bitcoin dip to $77,500 in October priced at 37.5% on Polymarket, down 4 points, on $493K traded

Polymarket priced the chance of Bitcoin dipping to $77,500 in October at 37.5%, down 4 probability points, with $493K traded, in the supplied update published Oct 18, 2026, at 7:09 AM ET.

The decline represents a lower market-implied probability of reaching that downside threshold—not a 4% fall in Bitcoin’s price. The supplied material does not give Bitcoin’s spot price or identify a catalyst for the repricing.

What the data captures

According to predictionbubbles.net, its movers tracker compares probabilities over 24 hours and refreshes every 15 minutes using prices from Polymarket and Kalshi. The supplied page records a venue-data snapshot of 18 Oct 2026, 10:36 UTC, earlier than the publication time of the headline update.

The tracker ranks changes by their absolute size in probability points, rather than by relative percentage changes or trading volume. Its stated universe covers 2,032 markets lasting longer than 14 days, with only open markets that have a valid 24-hour comparison eligible for ranking.

Limited evidence on the trigger

The supplied news summary reported no significant new platform headline in the preceding 15 minutes, with search results consisting of previously circulated items. That observation does not explain the Bitcoin contract’s move over the broader 24-hour measurement window.

The source excerpt describes the tracker’s methodology but does not display the specific $77,500 contract’s market card. The 37.5% probability, 4-point decline and $493K traded therefore come from the supplied headline; the excerpt does not independently establish the volume’s measurement period or the contract’s settlement terms.

What it means for prediction markets

• The downside threshold became less likely in market pricing. The 4-point decline concerns the chance of Bitcoin dipping to $77,500 in October, not the size of a move in Bitcoin itself.
• Volume and liquidity are different measures. The reported $493K provides trading context, but the supplied material does not show order-book depth.
• Timing limits causal conclusions. A quiet 15-minute news window cannot establish why a probability changed over 24 hours.
• Settlement details remain important. The excerpt does not specify how the contract determines whether the $77,500 threshold has been reached.