TOTAL VOLUME:
$134.2b
24H VOL:
$126,590,312
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,439,516,703
404,175
Markets across
30,277
events
MATCHED EVENTS:
2,685
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: May 29, 8:00 PM EST
Polymarket
This market tracks whether any major space weather events—geomagnetic storms, solar radiation storms, or radio blackouts rated severity 3 or higher—will occur during the week of May 24–30, 2026. On Polymarket, the probability that exactly zero such events will happen stands at 90.0%. Resolution will be determined by NOAA's Space Weather Prediction Center alerts table, which classifies events as G3 (Strong geomagnetic), S3 (Strong solar radiation), or R3 (Strong radio blackout). Watch for any official alerts from NOAA between May 24, 2026 at 12:00 AM ET and May 30, 2026 at 11:59 PM ET, as these will directly determine the final outcome.
Prediction market odds on Polymarket reflect crowdsourced expectations from active traders, while space weather analysts at NOAA's Space Weather Prediction Center and similar agencies publish probabilistic forecasts based on solar observation models. Market odds tend to incorporate real-time solar wind data, coronal mass ejection alerts, and geomagnetic storm watches more dynamically than static analyst reports. Comparing the two reveals whether traders are pricing in more or fewer major events than official forecasters expect, highlighting where market sentiment diverges from institutional expertise during periods of elevated solar activity.
The market resolves on May 30, 2026, marking the end of the May 24–30 observation window. Resolution is determined by the total count of major space weather events recorded during this period. Major events typically include significant solar flares, coronal mass ejections, and geomagnetic storms that meet established severity thresholds. Official space weather agencies and market oracles will tally confirmed events and settle the market to the outcome contract matching the final count. Traders holding shares in the winning outcome receive their payout upon settlement.
Real-time solar activity is the primary driver. Sudden coronal mass ejections, X-class solar flares, or rapid geomagnetic storm intensification will shift odds toward higher event counts. Conversely, declining solar wind speeds, weakening magnetic field disturbances, or quiet periods favor lower counts. Space Weather Prediction Center alerts and NOAA updates serve as key catalysts, as traders react immediately to upgraded or downgraded forecasts. Satellite data anomalies or corrections can also reprrice the market if they alter the confirmed event tally. As May 30 approaches, actual event counts will narrow uncertainty and compress odds around the true outcome.