Name: Max Arctic sea ice extent this winter?
Start: 2025-11-20T23:56:10.869544Z
End: 2026-04-01T00:00:00Z

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This market will resolve according to the maximum Arctic sea ice extent for all days between November 20, 2025 and April 1, 2026, as published by the National Snow and Ice Data Center.

This market will remain open until data has been published for April 1, 2026, at which point it will resolve immediately. Any revisions to sea ice extent recorded after data is published for April 1, 2026 will not be considered.

The resolution source for this market measures Arctic sea ice extent to thousands of square kilometers (e.g. 14.255 million sq km). Thus, this is the level of precision that will be used when resolving the market.

The resolution source for this market will be information from the National Snow and Ice Data Center, specifically the maximum value recorded for any day between November 20, 2025 and April 1, 2026 in the “NH-Daily-Extent” tab of the “Sea Ice Index Daily Extent” data set, available at https://nsidc.org/sea-ice-today/sea-ice-tools. If this resolution source becomes unavailable, another resolution source will be chosen. 

<14m sq km

14.2-14.4m sq km

14.6-14.8m sq km

15m+ sq km

14-14.2m sq km

14.4-14.6m sq km

14.8-15m sq km

Max Arctic sea ice extent this winter?

This market will resolve according to the minimum Arctic sea ice extent for all days between August 1, 2026 and October 1, 2026, as published by the National Snow and Ice Data Center.

This market will remain open until data has been published for October 1, 2026, at which point it will resolve immediately. Any revisions to sea ice extent recorded after data is published for October 1, 2026 will not be considered.

The resolution source for this market measures temperatures to thousands of square kilometers (e.g. 4.255 million sq km). Thus, this is the level of precision that will be used when resolving the market.

The resolution source for this market will be information from the National Snow and Ice Data Center, specifically the minimum value recorded for any day between August 1, 2026 and October 1, 2026 in the “NH-Daily-Extent” tab of the “Sea Ice Index Daily Extent” data set, available at https://nsidc.org/sea-ice-today/sea-ice-tools. If this resolution source becomes unavailable, another resolution source will be chosen.

Will the minimum Arctic sea ice extent this summer be less than 4m square kilometers?

This market will resolve to “Yes” if the listed city records a daily snowfall of at least 0.1 inches for any day between December 1 and December 31, 2025, as recorded by the National Weather Service (NWS). Otherwise this market will resolve to “No”.

If a daily snowfall of at least 0.1 inches is recorded by the National Weather Service for the listed city, this market will resolve immediately to “Yes”. If no such snowfall has been recorded, this market may not resolve until the NWS Daily Climate Report for the listed city for December 31, 2025 has been published.

The relevant National Weather Service locations for this market will be Central Park NY (New York City), Dallas/Fort Worth, TX (Dallas), Miami, FL (Miami), Seattle-Tacoma, WA (Seattle), Washington-National (Washington D.C.), Phoenix, AZ (Phoenix), Philadelphia, PA (Philadelphia), Atlanta, GA (Atlanta), Boston (Logan Airport), MA (Boston), and Pittsburgh, PA (Pittsburgh).

The resolution source for this market will be the National Weather Service, specifically the figure for  "SNOWFALL (IN)" when "Daily Climate Report (CLI)"  is selected under "Observed Weather" after navigating to the relevant city & location from https://www.weather.gov/wrh/climate.

Will it Snow in Boston this December?

This market will resolve according to the value reported by the Global Land-Ocean Temperature Index for November 2025 when it is released.

An anomaly within a named bracket for November 2025 is necessary and sufficient to resolve this market immediately once the data becomes available, regardless of whether the figure for November 2025 is later revised.

The primary resolution source for this market will be the figure found in the table titled "GLOBAL Land-Ocean Temperature Index in 0.01 degrees Celsius" under the column "Nov" in the row "2025" (https://data.giss.nasa.gov/gistemp/tabledata_v4/GLB.Ts+dSST.txt).

If NASA’s “Global Temperature Index” is rendered permanently unavailable, other information from NASA may be used.
If no information for November 2025 is provided by NASA by January 1, 2026, 11:59 PM ET, this market will resolve to the lowest range bracket.

Will global temperature increase by between 1.20ºC and 1.24ºC in November 2025?

This market will resolve based on the data for the Global Land-Ocean Temperature Index for November 2025 versus the data points available for all other Novembers on record.

Note: If November 2025 is tied for first, second, or third hottest with another year, it will qualify for the bracket it ties with.

The primary resolution source for this market will be the figures found in the table titled "GLOBAL Land-Ocean Temperature Index in 0.01 degrees Celsius" under the column "Nov" (https://data.giss.nasa.gov/gistemp/tabledata_v4/GLB.Ts+dSST.txt). If NASA's "Global Temperature Index" is rendered permanently unavailable, other information from NASA may be used.
If no information for November 2025 is provided by NASA by December 31, 2025, 11:59 PM ET, a consensus of credible sources will be used to resolve this market.

Will November 2025 be the 3rd hottest on record?

This market will resolve to "Yes" if the data for the Global Land-Ocean Temperature Index for 2025 shows an increase greater than that of any previously recorded year when it is released. Otherwise, this market will resolve to "No".

An anomaly greater than that of any previously recorded year for 2025 is necessary and sufficient to resolve this market to "Yes" immediately once the data becomes available, regardless of whether the figure for 2024 and/or 2025 is later revised.

The primary resolution source for this market will be the figure found in the table titled "Land-Ocean Temperature Index (C)" under the column "No_Smoothing" in the row "2025" (https://data.giss.nasa.gov/gistemp/graphs/graph_data/Global_Mean_Estimates_based_on_Land_and_Ocean_Data/graph.txt). If NASA's "Global Temperature Index" is rendered permanently unavailable, other information from NASA may be used. If no information for 2025 is provided by NASA by March 1, 2026, 11:59 PM ET, this market will resolve based on a consensus of credible reporting.

Will 2025 be the hottest year on record?

This market will resolve to "Yes" if the data for the Global Land-Ocean Temperature Index for 2025 shows the second greatest increase of any previously recorded year when it is released. Otherwise, this market will resolve to "No".

An anomaly which is the second greatest of any previously recorded year for 2025 is necessary and sufficient to resolve this market to "Yes" immediately once the data becomes available, regardless of whether the figure for 2024 and/or 2025 is later revised.

The primary resolution source for this market will be the figure found in the table titled "Land-Ocean Temperature Index (C)" under the column "No_Smoothing" in the row "2025" (https://data.giss.nasa.gov/gistemp/graphs/graph_data/Global_Mean_Estimates_based_on_Land_and_Ocean_Data/graph.txt). If NASA's "Global Temperature Index" is rendered permanently unavailable, other information from NASA may be used. If no information for 2025 is provided by NASA by March 1, 2026, 11:59 PM ET, this market will resolve based on a consensus of credible reporting.

Will 2025 be the second hottest year on record?

This market will resolve according to the numerical rank of how hot 2026 is when compared against all other years for which the Global Land-Ocean Temperature Index has data.

Years will be ranked in descending order, starting with the hottest as number 1, the second hottest as number 2, etc.

If 2026 ties with any other year, it will resolve according to the place the year it ties with occupies.

This market will resolve immediately once the specified data becomes available, regardless of whether the figure for the relevant years is later revised.

The primary resolution source for this market will be the figure found in the table titled "Land-Ocean Temperature Index (C)" under the column "No_Smoothing" in the row "2026" (https://data.giss.nasa.gov/gistemp/graphs/graph_data/Global_Mean_Estimates_based_on_Land_and_Ocean_Data/graph.txt). If NASA's "Global Temperature Index" is rendered permanently unavailable, other information from NASA may be used. If no information for 2026 is provided by NASA by March 1, 2027, 11:59 PM ET, this market will resolve based on a consensus of credible reporting.

Will 2026 be the second-hottest year on record?

This market will resolve to "Yes" if NOAA designates any storm in the Atlantic a hurricane between December 4, 2025, and May 31, 2026. Otherwise, this market will resolve to "No".

The resolution source for this market will be NOAA’s list of named storms during the Atlantic hurricane season (https://www.nhc.noaa.gov/data/tcr/) and/or their data on individual storms.

If there is a potential named storm that has not yet been classified by May 31, 11:59 PM ET, the market may remain open until June 1, 12:00 PM ET to determine if a classification was made prior to midnight.

Will a hurricane form by May 31?

This market will resolve to “Yes” if the National Weather Service records a snowfall observed value of at least .5 inches for the listed city on December 25, 2025.

The relevant National Weather Service locations for this market will be Central Park NY (New York City), Chicago O’Hare (Chicago), St. Louis, MO (St. Louis), Philadelphia, PA (Philadelphia), Detroit, MI (Detroit), Boston-Logan Airport (Boston), Dallas/Fort Worth, TX (Dallas), Miami, FL (Miami), Downtown San Francisco (San Francisco), Seattle-Tacoma, WA (Seattle), and Washington-National (Washington D.C.).

The resolution source for this market will be the National Weather Service, specifically the figure for  "SNOWFALL (IN)" when "Daily Climate Report (CLI)"  is selected under "Observed Weather" after navigating to the relevant city & location from https://www.weather.gov/wrh/climate.

Will Detroit have a white Christmas?

This market will resolve to “No” if any of the following conditions are met between September 19, 2025, 6 PM ET, and December 31, 2025, 11:59 PM ET:

- Artificial Intelligence is named TIME's Person of 2025
- GPT-5 scores above 40% on Humanity’s Last Exam
- AI wins IMO gold medal
- AI model scores ≥ 90% on FrontierMath Benchmark
- AI scores ≥85% on ARC-AGI-2

Otherwise, this market will resolve to “Yes”.

If resolution-relevant information regarding the events mentioned above is not available by December 31, 2025, 11:59 PM ET, this market will remain open until January 31, 2026, 11:59 PM ET. If by that date there is still no clear information indicating that one of the listed events has occurred,  this market will resolve to “Yes”.

The full rules for this market can be found here:
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Nothing Ever Happens: AI Edition

This market will resolve to "Yes" if the United States officially announces that Greenland will come under US sovereignty by December 31, 2025, 11:59 PM ET. Otherwise this market will resolve to "No".

Sovereignty is defined as the transfer of the majority of the territory of Greenland from its current status as an autonomous territory within the Kingdom of Denmark to being under the formal governance or jurisdiction of the United States, either as a state, territory, or other classification within the US system.

An official announcement made by the United States and Denmark that Greenland will come under US sovereignty will qualify, even if the actual transfer of sovereignty is yet to occur. Only announcements of official agreements or actions (e.g. executive order, signed legislation, etc.) will count - mere posts on Social Media will not.

The resolution source for this market will be official information from the governments of the US, Greenland, and Denmark , however a consensus of credible reporting confirming that Greenland has come under U.S. sovereignty will also qualify.

Will Trump acquire Greenland in 2025?

This market will resolve to the NFT with the highest ROI at the end of the Based AI trading competition beginning on December 2, 2025.

The resolution source is the official Based leaderboard available at: https://app.based.one/arena

If two or more NFTs are tied for the highest ROI at resolution time, the market will resolve to the NFT with the lowest ID number according to the official Based leaderboard.

If the competition is not completed by December 31, 2025, 11:59 PM ET, or if the official leaderboard or final results are unavailable, the market will remain open until Based publishes reliable data. If no such data becomes available by that date, the market will resolve to “Other.”

Will NFT #1946 win the Based trading competition?

This market will resolve based on the next earnings announcement of Snowflake currently scheduled to take place on November 26, 2025 at 5:00 PM EST.

This market will resolve to "Yes" if the listed term is mentioned by anyone during this event. Otherwise, the market will resolve to "No".

Any usage of the term, regardless of context, will count toward the resolution of this market.

Pluralization/possessive of the term will count toward the resolution of this market; however, other forms will NOT count.

Instances where the term is used in a compound word will count regardless of context (e.g. joyful is not a compound word for "joy," however "killjoy" is a compounding of the words "kill" and "joy").

If this market requires a specified number of mentions of a person’s first or last name, a full-name mention will count as one mention (e.g., if a market is about “Joe / Biden 5+ times,” a mention of “Joe Biden” will count once).

A Q&A event will count toward the resolution of this market.

If this event is definitely cancelled, or otherwise is not aired by December 31, 2025, 11:59 PM ET, this market will resolve to "No".

The resolution source will be audio of the event.

Will Snowflake say "Repurchase" during earnings call?

This market will resolve to "Yes" if the S&P 500 achieves a daily high price greater than 6,920.34 during market hours by December 31, 2025, 12:59 PM ET. Otherwise, this market will resolve to "No".

This market will resolve based on the S&P 500's highest intraday high during the specified timeframe.

The primary resolution source for this market will be figures from Yahoo Finance, specifically the finalized  "High" numbers listed under historical data (https://finance.yahoo.com/quote/%5EGSPC/history/).

S&P 500 all time high by December 31?

This market will resolve according to the official closing price for NVIDIA (NVDA) on the final trading day of 2025.

If the reported value falls exactly between two brackets, then this market will resolve to the higher range bracket.

If the final trading day is shortened (for example, due to a market-holiday schedule), the official closing price published for that shortened session will still be used for resolution. If no official closing price is published for that session (for example, due to a trading halt into the close, system issue, delisting, or other disruption), the market will use the last valid on-exchange trade price of the regular session as the effective closing price.

In the event of a stock split, reverse stock split, or similar corporate action affecting the listed company during the listed time frame, this market will resolve based on split-adjusted prices as displayed on Yahoo Finance.

The target price will be adjusted proportionally to reflect any stock splits. Resolution will be based on the historical price data as shown on Yahoo Finance after any adjustments have been applied.

The resolution source for this market is Yahoo Finance, specifically the NVIDIA (NVDA) "Close" prices available at https://finance.yahoo.com/quote/NVDA/history, published under "Historical Prices."

Will NVIDIA (NVDA) close at $175–180 in 2025?

This market will resolve to “Yes” if the Consumer Price Index (CPI) increased by greater than the listed percent over the 12 month period ending with any month in 2026 according to the monthly Bureau of Labor Statistics (BLS) reports. Otherwise, this market will resolve to "No".

The resolution source for this market will be the BLS Consumer Price Index reports released for each month of 2026 (https://www.bls.gov/bls/news-release/cpi.htm). Resolution of this market will take place upon release of the aforementioned data.

This market may not resolve to "No" until the December 2026 report is issued. Once the December 2026 report is issued, any revisions to previously released CPI figures will not be counted toward this market's resolution. If the CPI report for December 2026 is not issued by January 31, 2027, 11:59 PM ET, this market will resolve based on CPI figures which have already been made available by the BLS.

Note: the resolution source for this market will be the official monthly BLS CPI news release which reports inflation over 12 month periods to only one decimal point (e.g. 2.9%). Thus, this is the level of precision that will be used when resolving the market.

Will inflation reach more than 3% in 2026?

This market will resolve to "Yes" if the Atlas global browser market share is at least the listed percentage on December 31, 2025. Otherwise, this market will resolve to "No".

The relevant data will be sourced from StatCounter Global Stats, utilizing the following settings: Statistic: Browser; Checked: Desktop, Mobile, Tablet, Console; Region: Worldwide; Period: Daily (https://gs.statcounter.com/browser-market-share#daily-20251014-20251020).

Only the first released data will be considered; later revisions will not be used. 

If "Atlas" is not explicitly listed under these settings when data for this date is first released, this market will resolve to "No".

If the data is not reported by January 15, 2026, at 11:59 p.m. ET, or if the primary resolution source becomes permanently unavailable, an alternative resolution source will be selected.

Atlas global browser market share 1%+ on December 31?

This market will resolve based on OpenAI's market capitalization at the closing price on its first day of trading.

If no IPO occurs by December 31, 2026, 11:59 PM ET, the market will resolve to "No IPO by December 31, 2026".

Market capitalization expresses the monetary value of a company’s outstanding shares, stated in its pricing currency. It is calculated as the number of shares outstanding multiplied by the closing share price on the first trading day.

If the relevant value falls exactly between two brackets, then this market will resolve to the higher range bracket.

Resolution will be based on the primary exchange’s official listing page. In the event that the relevant figure is not displayed, another reliable source will be used.

In the event of an interruption in the course of the normal trading session on OpenAI’s first day of trading (e.g., a circuit breaker or half-day), the market will resolve according to the official closing price of the abbreviated session. If no such official closing price is published, the market will resolve according to the next trading day on which an official closing price is published, treating that as the first day of trading for purposes of this market.

Will OpenAI not IPO by December 31, 2026?

This market will resolve according to the official closing price for Microsoft (MSFT) on the final trading day of 2025.

If the reported value falls exactly between two brackets, then this market will resolve to the higher range bracket.

If the final trading day is shortened (for example, due to a market-holiday schedule), the official closing price published for that shortened session will still be used for resolution. If no official closing price is published for that session (for example, due to a trading halt into the close, system issue, delisting, or other disruption), the market will use the last valid on-exchange trade price of the regular session as the effective closing price.

In the event of a stock split, reverse stock split, or similar corporate action affecting the listed company during the listed time frame, this market will resolve based on split-adjusted prices as displayed on Yahoo Finance.

The target price will be adjusted proportionally to reflect any stock splits. Resolution will be based on the historical price data as shown on Yahoo Finance after any adjustments have been applied.

The resolution source for this market is Yahoo Finance, specifically the Microsoft (MSFT) "Close" prices available at https://finance.yahoo.com/quote/MSFT/history, published under "Historical Prices."

Will Microsoft (MSFT) close at $480–500 in 2025?

This market will resolve according to the official closing price for Apple (AAPL) on the final trading day of 2025.

If the reported value falls exactly between two brackets, then this market will resolve to the higher range bracket.

If the final trading day is shortened (for example, due to a market-holiday schedule), the official closing price published for that shortened session will still be used for resolution. If no official closing price is published for that session (for example, due to a trading halt into the close, system issue, delisting, or other disruption), the market will use the last valid on-exchange trade price of the regular session as the effective closing price.

In the event of a stock split, reverse stock split, or similar corporate action affecting the listed company during the listed time frame, this market will resolve based on split-adjusted prices as displayed on Yahoo Finance.

The target price will be adjusted proportionally to reflect any stock splits. Resolution will be based on the historical price data as shown on Yahoo Finance after any adjustments have been applied.

The resolution source for this market is Yahoo Finance, specifically the Apple (AAPL) "Close" prices available at https://finance.yahoo.com/quote/AAPL/history, published under "Historical Prices."

Will Apple (AAPL) close at $280–285 in 2025?

This market will resolve to the company which owns the model that has the highest “Mathematics Average” score on the LiveBench AI model leaderboard (https://livebench.ai/#/), on December 31, 2025, 12:00 PM ET. 

If two models are tied for the highest LiveBench Mathematics Average score at this market's check time, resolution will be based on whichever company's name, as it is described in this market group, comes first in alphabetical order.

The primary source of resolution for this market will be LiveBench’s AI leaderboard, specifically the “Mathematics Average” category, found at livebench.ai. If this resolution source is unavailable at check time, this market will remain open until the LiveBench AI leaderboard comes back online and will resolve based on the first check after it becomes available. If it becomes permanently unavailable, this market will resolve based on another resolution source.

Max Arctic sea ice extent this winter?

<14m sq km
$178 Vol.
23%

14-14.2m sq km
$6 Vol.
31%
0123456789
%

14.2-14.4m sq km
$5 Vol.
16%

14.4-14.6m sq km
$5 Vol.
13%

14.6-14.8m sq km
$5 Vol.
12%

14.8-15m sq km
$5 Vol.
8%

15m+ sq km
$110 Vol.
8%

Market Context

Max Arctic sea ice extent this winter?

Rules

Max Arctic sea ice extent this winter?

Market Context

Max Arctic sea ice extent this winter?

About

Related

Max Arctic sea ice extent this winter?

<14m sq km$178 Vol.23%buy Yes25¢buy No80¢

14-14.2m sq km$6 Vol.31%0123456789%buy Yes56¢buy No95¢

14.2-14.4m sq km$5 Vol.16%buy Yes25¢buy No94¢

14.4-14.6m sq km$5 Vol.13%buy Yes24¢buy No98¢

14.6-14.8m sq km$5 Vol.12%buy Yes17¢buy No94¢

14.8-15m sq km$5 Vol.8%buy Yes12¢buy No97¢

15m+ sq km$110 Vol.8%buy Yes14.5¢buy No99.1¢

Market Context

Max Arctic sea ice extent this winter?

Rules

Max Arctic sea ice extent this winter?

Market Context

Max Arctic sea ice extent this winter?

About

Related

<14m sq km
$178 Vol.
23%

14-14.2m sq km
$6 Vol.
31%
0123456789
%

14.2-14.4m sq km
$5 Vol.
16%

14.4-14.6m sq km
$5 Vol.
13%

14.6-14.8m sq km
$5 Vol.
12%

14.8-15m sq km
$5 Vol.
8%

15m+ sq km
$110 Vol.
8%