This is a typical pop culture/celebrity gossip market. While the Met Gala is a major fashion event, predicting the attendance of a specific celebrity (Lady Gaga) is a niche entertainment topic rather than a broad societal issue.

April 28, 2026 - April 29, 2026, Option_'Yes' price rebounded wildly from 49c to 79.5c, driven by bulls regaining control as the event approaches and dip-buyers rushing in after the previous panic sell-off. April 28, 2026 - April 28, 2026, Option_'Yes' price plunged from 88.5c to 49c, rebounded to 88.5c, and settled at 71.5c. This extreme intraday volatility was driven by panic selling and aggressive profit-taking due to the lack of official confirmation just days before the event, exacerbated by opportunistic dip-buying. April 25, 2026 - April 28, 2026, Option_'Yes' price surged from 73c to 88.5c, as more authoritative fashion media or insider leaks confirmed her schedule closer to the gala, removing final market doubts. April 24, 2026 - April 27, 2026, Option_'Yes' price surged from 64.5c to 83.5c, likely because as the Met Gala approaches, the market captured strong insider confirmations or explicit hints from mainstream media, leading to a massive influx of bullish capital. April 13, 2026 - April 14, 2026, Option_'Yes' price fell from 84.5c to 71c, as the market faced a lack of further official confirmation following the rapid run-up, leading to profit-taking by bullish investors and a short-term pullback. April 11, 2026 - April 13, 2026, Option_'Yes' price surged from 62c to 84.5c, likely because, as the Met Gala approached, the market picked up strong insider rumors or designer leaks regarding her custom outfit, massively boosting bullish expectations. April 5, 2026 - April 8, 2026, Option_'Yes' price surged from 37c to 56.5c, likely because the market detected a favorable gap in her tour schedule or new insider leaks emerged, fueling a strong bullish rebound. March 31, 2026 - April 1, 2026, Option_'Yes' plummeted from 51.5c to 18c, as the market realized she is occupied with her 'Mayhem Ball' tour and hasn't attended the Gala since 2019, leading to a collapse in bullish confidence and heavy sell-offs due to the lack of official confirmation. March 23, 2026 - March 24, 2026, Option_'Yes' plunged from 88.5c to 65.5c, as the market faced concentrated profit-taking after pushing prices significantly higher, lacking immediate catalysts to sustain the peak. March 20, 2026 - March 21, 2026, Option_'Yes' tumbled from 83.5c to 53c, indicating extremely fragile confidence among holders in the absence of official confirmation, triggering panic selling. March 13, 2026 - March 14, 2026, Option_'Yes' price retraced from 64c to 58c, as speculative capital took profits after a brief rally that was not sustained by official confirmation. March 5, 2026 - March 8, 2026, Option_'Yes' price drifted down from 54c to 46.5c, driven by profit-taking after the previous rally and a drying up of buy-side volume due to a lack of new confirmation. March 1, 2026 - March 2, 2026, Option_'Yes' rebounded sharply from 42.5c to 55c, likely a technical correction to the previous day's drop or driven by thin market depth where small buy orders cause outsized moves. February 28, 2026 - March 1, 2026, price plunged from 55c to 42.5c, highlighting the fragility of holder confidence and the extreme volatility caused by illiquidity.

There is a significant 'headline risk'. The title 'Trump x Greenland deal' evokes the viral 'purchase of Greenland' scenario, which is low probability. However, the rules are extremely broad ('Any U.S.–Danish agreement... regardless of subject matter'). This means a minor scientific or logistical treaty would resolve the market to 'Yes', creating a disconnect between the implied 'purchase' bet and the technical 'any treaty' reality.

Purchasing vast territories from sovereign nations is 19th-century geopolitics and highly unusual in modern international relations. While based on a real past proposal by Trump, it remains a highly exotic and 'novelty' subject for a prediction market.

Greenland is rich in Rare Earth Elements (REEs). Any 'deal' is highly likely to involve resource extraction rights or strategic access, directly impacting the non-Chinese REE supply chain and stocks like MP Materials (MP). A full territorial purchase would be a significant geopolitical boost for the US Dollar (DXY).

The rules exclude replies but note that replies recorded on the main feed will be counted by the tracker, which could cause resolution disputes. Furthermore, settlement heavily relies on a specific third-party tracker (xtracker.polymarket.com). Any tracker downtime or missed data (e.g., posts deleted before being captured) creates a risk of discrepancy with actual X data.

This is a typical novelty market for prediction platforms. For the general public, unless specifically incentivized, absolutely no one would care about or predict the exact number of tweets posted by the White House account in a single week, making it quite exotic.

Between 06:03 and 16:03 on April 28, 2026, the price of the '160-179' option surged from 38c to 58c, '180-199' surged from 23.5c to 44c, and '200+' surged from 14.5c to 45c. This suggests market expectations of a significantly higher posting frequency, likely due to breaking news or an intensive promotional campaign for a specific event. Between April 27 and April 28, 2026, lower posting brackets (e.g., 40-59, 60-79) experienced brief and anomalous price spikes (reaching ~24c) at 16:03 on April 28, before quickly retreating. This was likely due to mispricing from illiquidity or large market orders sweeping the book.

Predicting the exact number of posts by a public figure in a specific week is a classic novelty market. Unless they are betting, general audiences rarely care about such granular data.

April 28, 2026 - April 29, 2026: The Yes price for the 80-99 option dropped from 55.5c to 32.5c, and the 120-139 option dropped from 45c to 25.5c. This was due to a recalibration of extreme expectations as the actual posting data from the first day became available. April 27, 2026 - April 28, 2026: The Yes price for the 60-79 option surged from 0.75c to 32.7c, and the 80-99 option surged from 14c to 55.5c. This was due to a downward adjustment in posting pace expectations for the specific time window, combined with structural distortions in the order book. April 26, 2026 - April 27, 2026: The Yes price for the 120-139 option rose from 16.5c to 32c, as early forecasting funds identified this bracket as closely aligning with his historical average output.