The post Polymarket volume misreported as data providers double-count trades, report appeared on BitcoinEthereumNews.com. According to a report from Paradigm, an investor in Polymarket competitor Kalshi, several important data providers were miscounting Polymarket volume, leading to volume values double what the volume actually was. The report, which came from Paradigm’s research partner, Storm Slivkoff, detailed how many data providers were relying on counting the number of “OrderFilled” events that were emitted from the Polymarket contract. However, when a trade occurs on Polymarket, there are actually two “OrderFilled” events, one for the marker and one for the taker. Read more: Crypto traders ‘talking to lawyers’ over Polymarket’s Zelenskyy suit bet This data problem isn’t related to any wash trading that occurs on Polymarket but is simply a result of failing to appropriately account for how the smart contract emits these events. Examples of data providers that were over-counting the data included in the Paradigm report are DefiLlama, Allium, and Blockworks, all of whom are apparently working to correct this problem. Interestingly, Polymarket claims that this problem didn’t affect the data on its own website, with X user “primo_data,” who’s affiliated with Polymarket, noting that it “shows notional taker volume” in the same manner that Kalshi does and further noting that other dashboards had followed this method. This is not how prediction markets report volume, including your portfolio company Kalshi. To be clear: 1. Our site does not double count volume. We show notional taker volume (same as Kalshi). 2. The primary dashboards that show both Polymarket & Kalshi show notional volume… pic.twitter.com/9Bu0zm0DS0 — Primo Data (@primo_data) December 8, 2025 Read more: Why Polymarket users are betting that Jesus Christ will return Prediction markets have become increasingly important after the Commodity and Futures Trading Commission made the decision under the Trump administration to effectively allow binary options providers. Donald Trump Jr., is an advisor to both… The post Polymarket volume misreported as data providers double-count trades, report appeared on BitcoinEthereumNews.com. According to a report from Paradigm, an investor in Polymarket competitor Kalshi, several important data providers were miscounting Polymarket volume, leading to volume values double what the volume actually was. The report, which came from Paradigm’s research partner, Storm Slivkoff, detailed how many data providers were relying on counting the number of “OrderFilled” events that were emitted from the Polymarket contract. However, when a trade occurs on Polymarket, there are actually two “OrderFilled” events, one for the marker and one for the taker. Read more: Crypto traders ‘talking to lawyers’ over Polymarket’s Zelenskyy suit bet This data problem isn’t related to any wash trading that occurs on Polymarket but is simply a result of failing to appropriately account for how the smart contract emits these events. Examples of data providers that were over-counting the data included in the Paradigm report are DefiLlama, Allium, and Blockworks, all of whom are apparently working to correct this problem. Interestingly, Polymarket claims that this problem didn’t affect the data on its own website, with X user “primo_data,” who’s affiliated with Polymarket, noting that it “shows notional taker volume” in the same manner that Kalshi does and further noting that other dashboards had followed this method. This is not how prediction markets report volume, including your portfolio company Kalshi. To be clear: 1. Our site does not double count volume. We show notional taker volume (same as Kalshi). 2. The primary dashboards that show both Polymarket & Kalshi show notional volume… pic.twitter.com/9Bu0zm0DS0 — Primo Data (@primo_data) December 8, 2025 Read more: Why Polymarket users are betting that Jesus Christ will return Prediction markets have become increasingly important after the Commodity and Futures Trading Commission made the decision under the Trump administration to effectively allow binary options providers. Donald Trump Jr., is an advisor to both…