| Outcome | Probability | Yes Bid | Yes Ask | 24h Change | Volume | |
|---|---|---|---|---|---|---|
| Strategy (MicroStrategy) | 0% | 0¢ | 0¢ | — | $0 | Trade → |
| SoFi | 0% | 0¢ | 0¢ | — | $0 | Trade → |
| ✓ Vertiv Holdings | 0% | 0¢ | 0¢ | — | $0 | Resolved |
| Alnylam Pharmaceuticals | 0% | 0¢ | 0¢ | — | $0 | Trade → |
| Affirm Holdings | 0% | 0¢ | 0¢ | — | $0 | Trade → |
| Ares Management | 0% | 0¢ | 0¢ | — | $0 | Resolved |
| Pure Storage | 0% | 0¢ | 0¢ | — | $0 | Trade → |
| ✓ Ciena | 0% | 0¢ | 0¢ | — | $0 | Resolved |
This Kalshi event asks which companies will be officially added to the S&P 500 during Q1 of 2026; additions to the index matter because they can trigger large passive flows, change benchmark exposures, and affect share demand for named companies.
S&P 500 membership is decided by the S&P Dow Jones Indices committee, which periodically adds or removes companies when they meet eligibility criteria or when corporate actions require changes. Market participants closely watch earnings, market-cap shifts, M&A activity, and committee announcements in the lead-up to each quarterly window.
Odds in this prediction market reflect traders’ collective assessment of which companies the committee will name, not a guarantee; interpret changing odds as shifting market expectations driven by new information (earnings, filings, transactions, or official notices).
Resolution follows the event terms and official sources: Kalshi will use the companies officially listed by S&P Dow Jones Indices as added in the quarter designated (Q1 2026). If S&P provides an announcement with an effective inclusion date in Q1 2026, that official declaration is the basis for determining winners.
Expect expectations to shift around quarterly earnings releases, major SEC filings, confirmed M&A or spin-off news, and any public statements or publication of reconstitution dates by S&P Dow Jones Indices; index committee activity is often reflected in market rumors before official announcements.
Typical candidates are large-cap U.S.-listed companies with sufficient free float and liquidity, a primary U.S. listing (NYSE or Nasdaq), and a recent track record of profitability and market-cap growth; sudden improvements in size or liquidity can make a company a near-term candidate.
Corporate actions can both create and eliminate candidates: an acquisition can remove a target from consideration, a spin-off can produce a new eligible issuer, and share issuance or buybacks can change market-cap rankings — all of which the committee considers when making additions.
Track S&P Dow Jones Indices announcements, company press releases and earnings calls, 8-K and 10-Q/10-K filings, M&A deal notices, exchange transfer filings, and major changes to share float or analyst coverage; these items tend to produce the most informative updates to traders' expectations.