December 31, 2026 · Another S&P 500 Company buys Bitcoin by ___
December 31, 2026 is priced at 25¢ on Polymarket. Current book: 23¢ bid, 28¢ ask, 5¢ spread. This page tracks a standalone prediction-market contract.
Price history
25¢ current
−8¢Contract brief
This market will resolve to "Yes" if any S&P 500 company announces between November 4, 12:00 PM ET, and 11:59 PM ET on the date specified in the title that they bought Bitcoin for the first time. Otherwise, this market will resolve to "No". This announcement can pertain to a first purchase of Bitcoin outside of the timeframe of this market (e.g. if a qualifying company announces it made its first purchase of Bitcoin prior to this market's timeframe, but the announcement is made within the timeframe, this market will resolve to "Yes"). The primary resolution source will be official announcements from qualifying companies; however, a consensus of credible reporting will also be used.
Outcome
December 31, 2026
Rank
Standalone
Leader
—
Range
—
Family volume
$133K
Identifier
0xa2977abc...d73d
May 25, 2026, 11:08 PM UTC · 1m ago
Implied probability
Bid
23¢
Ask
28¢
Spread
5¢
24h volume
$51
Family rank
Standalone
Standalone contract
Closes
Jan 1, 2027
Family volume
$133K
Orderbook snapshot
23 / 28¢
Contract terms
What resolves this market.
YES condition
This market will resolve to "Yes" if any S&P 500 company announces between November 4, 12:00 PM ET, and 11:59 PM ET on the date specified in the title that they bought Bitcoin for the first time. Otherwise, this market will resolve to "No". This announcement can pertain to a first purchase of Bitcoin outside of the timeframe of this market (e.g. if a qualifying company announces it made its first purchase of Bitcoin prior to this market's timeframe, but the announcement is made within the timeframe, this market will resolve to "Yes"). The primary resolution source will be official announcements from qualifying companies; however, a consensus of credible reporting will also be used.
Venue
Polymarket
Closes
Jan 1, 2027
Identifier
0xa2977abc…d73d
Event family
Another S&P 500 Company buys Bitcoin by ___.
The same race as a probability stack: rank, volume, and where this contract sits against the other outcomes.
Total volume
$133K
Outcomes
1
Highest price
December 31, 2026 25¢
Current share
100%
Indicators
Yield, cliff risk, volatility, and regime.
Regime
neutral
Score
0.409
Observability
medium
Event type
financial
Full indicator table
Related readings
Matched from SimpleFunctions blog, opinions, technical guides, concepts, and learn pages.
Kalshi vs Polymarket: Which Prediction Market Should You Trade?
In-depth comparison of Kalshi and Polymarket for prediction market traders. Regulatory structure, liquidity, fees, API tooling, and cross-venue trading with SimpleFunctions.
Kalshi vs Polymarket: Mechanics, Fees, Regulation, Liquidity (2026)
Side-by-side comparison of Kalshi and Polymarket in 2026. Fee math, calibration data, withdrawal speed, and a decision tree for picking the right venue.
Liquidity Availability Is the Real Edge in Prediction Markets
Implied yield, cliff risk, and overround all describe what to trade. Liquidity Availability Score describes whether the orderbook can absorb the trade. Why LAS is the indicator that decides who actually books P&L.
Maker / Taker Regime in Prediction Markets: How to Read the Orderbook State
Three regime states (maker-dominated, taker-dominated, neutral) and how to read which one a Kalshi or Polymarket contract is in. Strategy follows regime, not thesis.
Prediction Market Orderbook Analysis: Reading Depth, Spread, and Liquidity
How to read prediction market orderbooks. Binary settlement, spread-as-percentage, depth asymmetry, executable edge calculation, and cross-venue arbitrage analysis.
Kalshi vs Polymarket: A Developer's Comparison of APIs, Orderbooks, and Liquidity
Data-driven comparison of Kalshi and Polymarket APIs, orderbooks, rate limits, and liquidity. Code examples for building on both prediction markets.
SimpleFunctions context
Index, screen, query, and monitor.
Prediction Market Index
Market-wide volatility, geo risk, breadth, and activity around this contract.
Market Screener
Filter adjacent contracts by volume, expiry, IY, CRI, venue, and theme.
Event Probability API
Read 25% as a structured event probability object for agents and apps.
Realtime Data API
Prices, orderbooks, movement, heat, and liquidity indicators across venues.
World State API
Compact market-aware context packets for agent sessions and scheduled refresh.
Hedging Workflows
Map a thesis or exposure to candidate event markets and monitoring paths.
How we compute these odds
SimpleFunctions aggregates live prediction-market contracts from Kalshi and Polymarket. Each slug groups contracts that resolve on the same underlying event, identified by venue event_id.
For binary slugs, the headline probability is the liquidity-weighted mid-price across all bound contracts. For multi-outcome slugs (e.g. elections with 3+ candidates), the headline is the leader’s price; we never arithmetically average disjoint outcomes — that would produce a number with no real-world meaning.
Snapshots refresh every 5 minutes during market hours; daily aggregates are computed at 04:00 UTC. The 30-day sparkline is drawn from per-ticker daily means stored in market_indicator_daily; 24h delta and movement events are derived from the same source.