Kalshi's Liquidity Bootstrapping Problem

Kalshi’s real constraint is not user demand, it is getting enough traders into the same few markets at the same time for prices to feel trustworthy and orders to fill instantly. In practice, a thin market means wider spreads, smaller order size at each price, and a higher chance that a user clicks into a contract, sees little depth, and leaves. That pushes Kalshi toward categories like sports and elections, where many people naturally converge on the same event and bootstrap liquidity faster.1 2 3

• Prediction markets behave like exchanges, not content apps. A new market is only useful if both sides show up. That is why outside aggregators are building routers that merge equivalent markets across venues, so a trader can see one deeper book instead of several shallow ones.2
• Kalshi’s regulated U.S. setup gives it credibility, but it also depends on concentrated, on platform liquidity and charges materially higher take rates than crypto native rivals. Polymarket used zero fee trading and global crypto rails to pull users into the same markets faster, especially in politics.3
• The distribution tie up with Robinhood matters because retail flow can solve the cold start problem overnight. If that flow shifts elsewhere, Kalshi does not just lose traffic, it loses the repeated order flow that helps thin markets look active enough for the next trader to participate.2 4

The next phase of the market will be a fight over who controls the liquidity layer. The winners will be the venues and routers that can pool fragmented demand across sports, politics, crypto, and niche contracts, so more markets feel tradable on day one instead of waiting months to thicken.2 3 4