Navi Pillay's Nobel win settled on a Polymarket catch-all that drew $38,800 of $32.3 million

Polymarket's book did contain a contract that paid on Pillay, whom the Nobel committee chose on Oct. 9 ^[2]. It was the catch-all, created with the rest of the market in October 2025. Until the announcement it read "Will any other person or organization win the Nobel Peace Prize in 2026?", and Polymarket put her name on it afterwards ^[7]. About $38,800 traded on that line ^[8], roughly one dollar in every 830 the market took ^[15]. The Trump contract alone drew $7.96 million ^[3], about 205 times as much ^[21]. Trump, UNRWA and Navalnaya together took 37.3% of the volume ^[17]. The report does not include the catch-all's price before the announcement, and that price was the market's own estimate that the winner would come from off the list.

Kalshi's book was more concentrated still. Trump took 3.06 million of its roughly 5.7 million contracts, or 53.7% ^{[9] [19]}, against 24.6% of Polymarket's dollars ^[16]. News.bitcoin.com, which compiled the figures, wrote that traders "can only price the outcomes that are listed by the exchange" and that "the money follows familiar names" ^[14].

The Navalnaya buying was fast. From about 23:30 UTC her contract went to 54 cents within half an hour, according to Polymarket's public trade data ^[4], and the 70.6-cent peak was about 14 times her evening price ^[18]. Within minutes she was back below 20 cents. She then traded between 20 and 30 cents through the morning ^[5], still a one-in-four or one-in-five chance on a candidate who lost. I think buyers took the overnight move as a leak, and they had a precedent. RG.org noted that a similar late surge a year ago came before Maria Corina Machado's win ^[6].

The same record gives some support to the case for these markets as forecasters. If the catch-all was priced near a sensible chance of an outsider, Polymarket priced the uncertainty correctly and only the crowd's money was in the wrong place. Kalshi listed literature winner Anne Carson and medicine co-laureate Karl Deisseroth ^[11], so coverage varies by prize. And the sums are small. The Peace market's $32.3 million since October 2025 ^[1] is about 0.05% of the $68 billion the industry's sports and combo contracts reached in a single month this fall ^{[13] [20]}.

In my view that ratio explains the short lists. Polymarket's physics book drew about $5,300 across 24 names ^[10]. With sports and combo contracts at that scale, an exchange has little revenue reason to research a longer list of physicists. I'd expect the lists to stay short and the catch-alls optional.