When we get something wrong, we fix it. This page explains how to report an error and lists the significant corrections we’ve made, newest first.
How to report an error
Email [email protected] with the page address and what you think is wrong. A link to a source helps. We read every message.
- Facts and figures (fees, rules, availability, court rulings, dates): we check the claim against the primary source, correct the page, update its date and log significant corrections below.
- Live prices: these come straight from the Polymarket and Kalshi feeds. If a price looks wrong, tell us the page and the time; we’ll check whether it’s a feed problem or an error in how we match or calculate it. See our methodology.
- What we log: corrections that change a fact, figure or conclusion. We don’t log typo fixes, routine updates to dated facts, or new information added as a story develops.
Corrections log
Prediction Tape launched publicly on October 28, 2026. Entries dated before then come from our pre-launch review.
| Date | Page | Correction |
|---|---|---|
| October 28, 2026 | CLARITY Act odds | The page described the bill as waiting for the Senate. It left out that a Senate cloture vote to begin debate failed 49–50 on September 15, 2026, which stalled the bill. The page now explains the vote, how the bill could be revived and what regulators are doing meanwhile. |
| October 28, 2026 | Freshness review of our platform and comparison pages: Polymarket, Polymarket US, Kalshi, Kalshi vs Polymarket, Kalshi alternatives, Best apps and others | Several pages said Polymarket’s main exchange settles in USDC; trading balances are now held in pUSD, a dollar token backed one-to-one by USDC, and the pages now say so. The Polymarket profile called combos on Polymarket US a beta; they launched in August 2026. The Kalshi profile said a Supreme Court case “may eventually” come; New Jersey has already petitioned, and the Sixth Circuit ruling in Ohio and Tennessee is now described as a panel decision under a rehearing request. Kalshi alternatives listed Coinbase as available in all 50 states without noting the Nevada court order. We had said Polymarket’s Android app was “coming soon”; we couldn’t confirm that or find an official Android listing, so the pages now say so. |
| October 28, 2026 | Coinbase, Crypto.com, Nevada | The Coinbase profile still said a court order had “paused” Coinbase’s prediction markets in Nevada; it was a state court preliminary injunction granted on March 26, 2026, which we had corrected on the Nevada guide but missed here. We had removed Crypto.com’s November 2025 Nevada exit from the Nevada guide as unsourced; it is confirmed by the Nevada regulator’s notice (effective November 3, 2025), so we restored it with sources and added the Ninth Circuit ruling and Crypto.com’s Supreme Court petition. |
| October 28, 2026 | About | The page said some links to platforms “may be affiliate links”. We have no affiliate relationships; the section now says so. |
| October 28, 2026 | About | The page described every price as the last traded price. That’s true for Kalshi; for Polymarket we show the outcome price its market API reports. Now explained in our methodology. |
| October 27, 2026 | State legal guides: Nevada, Ohio, New Jersey, Michigan, Minnesota, Utah, Arizona, Massachusetts, Is Kalshi legal? | Some wording presented court rulings that are preliminary or under appeal as settled (for example, that Kalshi’s Nevada sports contracts had been “shut down”, and that Ohio “may enforce” its law). It now says which orders are preliminary and which appeals are pending. We removed claims we couldn’t source (that Crypto.com left Nevada in November 2025, and that Coinbase had “paused” there), replaced them with dated court orders, and added a dated source list to each page. |
| October 27, 2026 | AI and tech IPO odds | The page treated a SpaceX IPO as a future event. SpaceX went public on June 12, 2026. |
| October 27, 2026 | No-vig calculator | Even-money results were shown as −100 in American odds. They now show as +100. |
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