The title specifies 'Seoul', but the resolution criteria explicitly relies on data from the Incheon Intl Airport Station. Because Incheon is coastal, its lowest temperature can differ noticeably from inland Seoul, creating a trap for bettors relying on general Seoul weather forecasts. Additionally, the rounding to whole degrees Celsius introduces edge-case risks for boundary values.

May 1, 2026 - May 2, 2026, the price of 12°C surged significantly from 9c to 60c. The reason is that as the resolution date approaches, weather models have converged on a low temperature of around 12°C for May 3, which the market has priced in. May 1, 2026 - May 2, 2026, the price of 10°C surged from 9c to 37c before pulling back to 22c, because weather forecasts temporarily showed a possibility of slightly cooler temperatures before correcting back to warmer expectations.

Predicting the exact daily low temperature bracket for a specific city is a relatively niche but not extremely bizarre market, commonly seen in specialized weather betting fields.

Between 14:03 and 20:33 on May 2, 2026, the Yes price for the 44-45°F option plummeted from 36c to 11c, mainly due to the latest weather model updates indicating a warmer minimum temperature, thus lowering the probability of this bracket. Between 22:53 on May 1 and 01:03 on May 2, 2026, the Yes price for the 46-47°F option surged from 25c to 74.5c. This was because weather forecasts during this period showed a slowing cooling trend, suggesting the minimum temperature might stay at a higher level, though the price subsequently began to retreat.

The rules contain several potential pitfalls: standard replies do not count, but 'main feed replies' do, which can cause ambiguity. Deleted posts only count if caught by the tracker within a ~5-minute window, creating a technical risk. Furthermore, resolution strictly relies on Polymarket's proprietary tracker, which might desync from X's actual data.

Betting on the exact number of tweets a billionaire makes in a specific 48-hour window is a highly niche and novelty-driven entertainment market. The general public does not ponder this, though it serves as a typical, highly entertaining meme market within crypto prediction circles.

Between May 2, 2026, and May 3, 2026, the '<40' option surged from 13c to 41.5c, while the '65-89' option plummeted further from 22.5c to 5.5c. This occurred because, after the tracking period started, Musk's actual posting volume was lower than initially expected, prompting the market to heavily downgrade its forecast for his total posts. Between April 30, 2026, and May 2, 2026, the '40-64' option price continued to rise from 43.5c to 65.5c, while the '65-89' option fell further from 38c to 16.5c. This occurred as the tracking period was about to start, and the market adjusted expectations based on his latest activity levels, solidifying the belief in a moderate posting frequency. Between April 30, 2026, and May 1, 2026, the price of the '65-89' option dropped significantly from 38c to 26.5c, while the '40-64' option rose from 43.5c to 51.5c. This reflects an initial shift in market expectations regarding Musk's posting frequency, predicting it will more likely fall in the lower range.

While weather prediction markets and derivatives exist in professional fields, betting on the exact daily high temperature at a specific airport remains a relatively niche and novelty topic for general prediction market participants.