Coinbase and Kalshi introduce perpetual crypto futures, marking the first time the contracts will be available to US investors via domestic, regulated exchanges (Pritam Biswas/Reuters)

Pritam Biswas / Reuters: Coinbase and Kalshi introduce perpetual crypto futures, marking the first time the contracts will be available to US investors via domestic, regulated exchanges — Cryptocurrency exchange Coinbase (COIN.O) and prediction markets platform Kalshi said on Friday they are…