Kalshi announced Friday that it will begin offering perpetual futures contracts — a form of derivative that moves the prediction market company into more complex trades than conventional yes-or-no bets.Why it matters: Perps — as they're commonly known — serve as futures contracts that allow investors to effectively bet on whether the price of an existing asset will go up or down.Driving the news: Kalshi said it will become "the first company in American history to offer perpetuals" and that the...