There is a severe contradiction in the rules. The first paragraph states 'any YouTube video' posted before April 30 counts, but the final note strictly restricts the market to his 'next video to be posted'. If the immediate next video fails but a subsequent one succeeds, the resolution will be highly disputed.

Predicting the exact highest temperature of a specific city on a future date is a relatively niche prediction market topic. While weather forecasts are common, trading on such mundane daily data has a certain novelty to it.

2026-04-12 to 2026-04-13, the price of 32°C surged from 11c to 41c before falling back to 17c, and 33°C surged from 7.5c to 28.5c before dropping. This is due to short-term fluctuations in rain probability and high temperature forecasts in the final two days, before the forecast stabilized around 31°C. 2026-04-12 to 2026-04-12, the price of 27°C plummeted from 25.5c to 8c, 28°C dropped from 26.5c to 7c, 29°C dropped from 26.5c to 5.5c, and 31°C surged from 29c to 41c. This is because updated weather forecasting models ruled out abnormally low temperatures as the date approached, driving funds to concentrate on the most likely outcome of 31°C.

The exact word-matching rules are strict (plurals, possessives, and compound words count, but not other forms), and some options require specific frequency thresholds (e.g., 5+ times). This creates a high risk of resolution disputes based on minor transcript discrepancies.

This is a classic 'political speech bingo' market. Predicting the exact vocabulary a politician will use in a single interview (including obscure terms like 'Bottom of the Sea') is a highly niche, novelty, and entertainment-driven prediction.

The Yes price for highly frequent terms (like Biden, Inflation) on Polymarket is only 0.415, severely underestimating the probability of Trump mentioning these signature political and economic terms. Mainstream media and historical text analyses consistently identify these as his core talking points.

Predicting the specific temperature of a certain city is a common category in prediction markets, but for most non-locals or non-meteorology enthusiasts, thinking about such highly specific figures is rare in daily life.

April 12, 2026 - April 13, 2026, the price of the 9°C option surged from 26.5c to 43.5c, while options like 8°C, 11°C, 12°C, and 7°C plummeted by 15-25c. This is because, as the settlement date nears, forecasts show an overwhelming probability of the high temperature landing in the 9-10°C range, rapidly cooling market expectations for non-core ranges. April 12, 2026 - April 12, 2026, the prices of edge options like 8°C, 14°C, 15°C, and 16°C or higher plummeted by more than 10c each. This is because as the target date approaches, weather forecasts are converging to the 9°C-12°C range, significantly dropping the probability of extreme temperatures.

Predicting the exact daily high temperature for a specific city that is not a major global economic hub is a typical niche weather market. Unless one is a local resident or a weather/energy derivative trader, the general public wouldn't naturally ponder this question, giving it a moderate novelty factor.

April 12, 2026 - April 13, 2026: The price of '12°C' plummeted from 33.5c to 7.75c, '15°C or higher' spiked from 29c to 54.5c before dropping to 22.5c, and '14°C' climbed from 28c to 44.5c. This occurred because, as the target date approaches, weather models have become more confident in a warmer peak temperature, effectively ruling out cooler scenarios. Prior to April 12, 2026: Several options including '8°C', '9°C', and '10°C' experienced price crashes of over 10c (e.g., 8°C plummeted from 25c to 2c, 10°C from 25c to 12.5c). This correction occurred because weather forecasts converged on warmer expected temperatures (12°C-15°C), prompting the market to heavily discount the probability of cooler outcomes.

Between April 12 and April 13, 2026, the price of 20°C rose from about 24.5c to a peak of 35c before dropping to 19c, driven by expectation shifts due to real-time weather data updates as the settlement date approached. Between April 12 and April 13, 2026, the price of '18°C or below' plummeted from 38c to around 9c as the likelihood of actual temperatures exceeding this threshold increased significantly. Between April 12 and April 13, 2026, the price of 23°C crashed from 25.5c to around 3.4c, as the probability of reaching 23°C was disproven by the market over time.

While daily weather is widely monitored, betting on the exact integer high temperature for a specific city on a specific date falls outside standard daily concerns. It carries some novelty but remains a standard, albeit niche, category within prediction markets.

Between April 12, 2026, and April 13, 2026, the price of 18°C plummeted from 27.5c to 3.5c, and 19°C crashed from 18c to less than 1c. Simultaneously, lower temperature options like 12°C and 14°C also experienced significant drops (e.g., 14°C fell from 25c to roughly 10c). This is because, as the resolution date approaches, weather forecast models have ruled out extreme temperature scenarios, narrowly locking the expected high temperature into the 15°C-17°C range.

The title mentions 'Denver', but the rules strictly specify using data from the Buckley Space Force Base Station (located in Aurora). Users relying on generic Denver weather forecasts (which typically use Denver International Airport data) may face discrepancies due to microclimates and station location differences if they ignore the specific Wunderground link.

Between April 12, 2026 11:48 and April 13, 2026 10:33, the price of the 58-59°F option surged from 12c to 27.5c, as updated forecasts confirmed the cooling effect of expected precipitation, lowering the projected high temperature. Between April 12, 2026 11:48 and April 12, 2026 21:33, the price of the 66°F or higher option plunged from 39c to 5.5c, because short-term weather forecasts explicitly ruled out the possibility of extreme heat on April 14. Between April 12, 2026 05:18 and April 12, 2026 06:23, the price of the 60-61°F option surged from 13c to 24.5c, while the 64-65°F option plunged from 26.5c to 16c. This occurred because meteorological platforms like Wunderground updated their forecasts, revising the expected high temperature down to around 60°F.

The title asks for the highest temperature in Seoul, but the resolution rules explicitly specify the Incheon Intl Airport Station (RKSI). Incheon Airport is located on the coast/island, and its temperatures often differ significantly from inland central Seoul (potentially by several degrees). This geographic mismatch between the headline and the specific resolution source is a major trap for traders who don't read the fine print.

April 12, 2026 - April 13, 2026, the price of 22°C surged from 15c to 33c, and the price of 23°C spiked from 9c to 28c, as newly released weather forecast models revised the expected high temperature for April 14 into this range.

The rules mention using the 'Forecast' from Wunderground but provide a link to the 'History' page, which could cause literal ambiguity regarding the resolution criteria. Additionally, occasional missing data on the weather platform or the integer rounding rules when converting from Fahrenheit to Celsius might lead to edge-case disputes.

April 13, 2026 - April 13, 2026, the price of '24°C or higher' plummeted from 45c to 7.5c. The reason is that as the target date approaches, the latest weather forecasts clearly indicate a high of around 21-22°C, largely ruling out the possibility of an extreme high of 24°C or above.

On April 13, 2026, the price of the 28°C option collapsed from 21c to 7c, while the 31°C and 32°C options surged (31°C from 19c to 28.5c; 32°C from 16c to 25c). This was driven by updated short-term weather forecasting models ruling out cooler temperatures and shifting the expected high into the 31-32°C range.

There is a massive divergence between market pricing and mainstream expectations. The implied probabilities for Tyler, The Creator and Billie Eilish (around 28.9% and 25.5% respectively) far exceed their fundamental likelihood of being the Billboard Year-End #1 Artist. Conversely, dominant chart performers like Taylor Swift and Morgan Wallen are severely underpriced (around 10% and 9%). This divergence is primarily driven by severe market inefficiency and potential arbitrage/algorithmic manipulation in this specific market, rather than a genuine shift in forecasting sentiment.

China's Q1 GDP data is a key indicator of global economic health. A miss or beat would directly impact commodities (especially Crude Oil and Copper, given China's consumption) and China-related ETFs (like FXI). The Australian Dollar (AUDUSD), often a proxy for the Chinese economy, would also see significant volatility. While there is some impact on the broader US stock market, it is typically a secondary effect.

April 10, 2026 - April 13, 2026, the price of the '5.0-5.5%' option rebounded quickly from a brief dip at 44.5c to stabilize above 70c, while '4.5-5.0%' fell from 46.5c to around 27c. The reason is that as the data release approaches, market consensus on Q1 GDP growth reaching over 5% has reconsolidated, anchoring capital back in the high-probability bracket. April 11, 2026 - April 12, 2026, the price of the '4.5-5.0%' option dropped from 32.5c to 15c, while '5.0-5.5%' rebounded from 60.5c to 71.5c, as the market likely received confirmation of stronger internal indicators or policy effects, triggering drastic position shifts. April 10, 2026 - April 11, 2026, the price of the '5.0-5.5%' option rebounded sharply from 44.5c to 67.5c, while '4.5-5.0%' dropped from 46.5c to 29.5c, as expectations for meeting the official Q1 economic target warmed up again after brief pessimism. April 10, 2026, the price of the '4.5-5.0%' option surged from 23.5c to 46.5c, while '5.0-5.5%' plummeted from 75.5c to 44.5c, likely due to institutional forecast downgrades or weakening high-frequency indicators right before the release, causing severe market divergence on whether Q1 GDP can hold at 5%. March 30, 2026 - April 8, 2026, the '4.5-5.0%' and '5.0-5.5%' options experienced multiple wide swings of over 15c due to volatile leading indicators and fluctuating policy expectations.

April 12, 2026 - April 13, 2026, the price of '28°C' plunged from 27.5c to 2.45c, while '31°C' surged from 8.5c to 23.05c, and '29°C' rose to 40c. The reason is that updated aviation weather forecasts (TAF) for Shenzhen Bao'an Airport revised the expected high temperature upward to around 30°C, drastically reducing the likelihood of 28°C and driving capital into higher temperature brackets. No options have experienced a drastic price movement of over 10c recently; prices have remained stable in line with minor adjustments in weather forecasts.