Total Active Markets

Count of all non-resolved markets currently tracked across Polymarket, Kalshi, and Limitless.

129,184

Total Volume

Lifetime trading volume across all platforms. Polymarket and Kalshi report volume directly; Limitless volume is cumulative USDC traded.

$5,857,617,844

24h Volume

24-hour trading volume. Polymarket and Kalshi report this directly. Limitless does not break out 24h volume separately, so it is not included.

$593,814,055

Total Open Interest

Polymarket: sum of pool liquidity. Kalshi: open interest (contracts outstanding). Limitless: uses total volume as a proxy — no separate OI metric is available.

$3,528,876,133

Polymarket$3.11BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.

Kalshi$391.73MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.

Limitless$25.08MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.

Total Active Markets

Count of all non-resolved markets currently tracked across Polymarket, Kalshi, and Limitless.

129,184

Total Volume

Lifetime trading volume across all platforms. Polymarket and Kalshi report volume directly; Limitless volume is cumulative USDC traded.

$5,857,617,844

24h Volume

24-hour trading volume. Polymarket and Kalshi report this directly. Limitless does not break out 24h volume separately, so it is not included.

$593,814,055

Total Open Interest

Polymarket: sum of pool liquidity. Kalshi: open interest (contracts outstanding). Limitless: uses total volume as a proxy — no separate OI metric is available.

$3,528,876,133

Polymarket$3.11BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.

Kalshi$391.73MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.

Limitless$25.08MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.

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Number of TSA Passengers March 21?

Updated Today

Volume:$229

Resolves:Mar 21, 2026

Trade on Polymarket

3.0M-3.2M

$581 vol

7.5%

probability

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Frequently Asked Questions

What are the current odds for Number of TSA Passengers March 21??

As of March 18, 2026, the Polymarket odds for Number of TSA Passengers March 21? are: 3.0M-3.2M: 8%. These probabilities are derived from real-money trading and update in real time.

Where can I bet on Number of TSA Passengers March 21??

Number of TSA Passengers March 21? is currently available on Polymarket. Check PredictMarketCap for cross-platform availability as new markets are added regularly.

How are Number of TSA Passengers March 21? prediction market odds calculated?

Prediction market odds reflect the aggregate opinion of traders who risk real money on outcomes. The price of a share (e.g., 65¢) represents the market's implied probability (65%). Prices move as traders buy and sell based on new information, polls, and analysis.