The sole prediction market tracking this event, Polymarket, shows a 0% chance that Fannie Mae's market cap will land in the $200B-$250B range on IPO day, based on $54,000 in trading volume. No other platforms—Kalshi or Manifold—offer contracts on this specific outcome, making Polymarket the only source of probabilistic data. The 0% probability reflects traders' conviction that the government-sponsored enterprise's valuation will either fall short of or exceed the specified range, though the market does not distinguish between these two scenarios. Without any recent news headlines to explain the shift, the consensus appears driven by broader expectations around Fannie Mae's privatization timeline and market conditions. The lack of cross-platform data limits the ability to gauge market depth, but the unanimous 0% reading suggests strong trader confidence in the outcome.