Will OpenAI be assigned to Information Technology in the S&P 500
Leader sits at 86% across 6 bound outcomes, runner-up at 14%. This is a winner-take-all market — the headline is the leader’s price, not an arithmetic mean.
Leader probability
Information Technology
Outcomes
6
winner-take-all
Runner-up
14¢
Unassigned
Spread
72pp
dominant leader
24h volume
$1
thin orderbook
Closes
Jan 11, 2028
478 days
Venue
Kalshi
6 bound
30-day trend
Bracket family
How the bracket ladder is priced.
Each row is one outcome on the venue. Sorted by 24h volume — the heaviest book is at the top.
Cluster 1
Will OpenAI be assigned
Will OpenAI be assigned to Information Technology?: Information Technology
KXOPENAISECTOR-XX-INFORMATI
Will OpenAI be assigned to Unassigned?: Unassigned
KXOPENAISECTOR-XX-UNASSIGNE
Will OpenAI be assigned to Real Estate?: Real Estate
KXOPENAISECTOR-XX-REALESTAT
Will OpenAI be assigned to Materials?: Materials
KXOPENAISECTOR-XX-MATERIALS
Will OpenAI be assigned to Health Care?: Health Care
KXOPENAISECTOR-XX-HEALTHCAR
Will OpenAI be assigned to Communication Services?: Communication Services
KXOPENAISECTOR-XX-COMMUNICA
Analysis
This represents the market's assessment that when OpenAI joins the S&P 500, it will be classified under Information Technology rather than Communication Services or remain unassigned. The 73% probability reflects Information Technology as the leading outcome, though 27% of contract value is allocated to alternatives. Classification depends on S&P Dow Jones Indices' methodology, which categorizes companies based on revenue sources and business focus. OpenAI's primary revenue comes from AI services and software, pointing toward Information Technology, but its consumer-facing Chat interface and content distribution could support Communication Services classification. The catalyst is OpenAI's S&P 500 inclusion announcement, which will specify the assigned sector. Until then, uncertainty persists around how index administrators weigh OpenAI's diverse revenue streams and whether they prioritize enterprise AI services or consumer-facing products in their classification decision.
- ›S&P Dow Jones Indices' official classification methodology favors Information Technology for software and AI service providers with enterprise revenue
- ›OpenAI's revenue composition—estimated heavily weighted toward enterprise API and ChatGPT Plus subscriptions—supports IT classification over Communication Services
- ›Historical precedent shows AI and software companies like NVIDIA and Palantir classified as Information Technology, establishing a baseline expectation
- ›Communication Services classification would require S&P to emphasize OpenAI's consumer products (ChatGPT) as primary business driver, contradicting typical IT sector assignments
- ›No official S&P sector pre-announcement has been disclosed, making the 27% non-IT probability dependent on unexpected revenue breakdown or reclassification policy changes
What moved the line
- Sep 17Unassigned↑8pp6→14¢ · Kalshi
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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.
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