A desk doing $3.5T/yr doesn't quote two-sided on $60B of event contracts to earn 50bps — Polymarket retail LPs and Kalshi MM slots just got their replacement. 'Liquidity provider' instead of market maker is regulatory posture: same exposure, different counterparty obligations. Three weeks after Kalshi's $22B raise on 800% institutional flow growth, prediction markets got their professional rails — and the retail spread that funded the last cycle goes with it.

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