MADRID, May 26 (Reuters) - Spain's Consumer Rights Ministry temporarily banned so-called prediction markets Polymarket ‌and Kalshi for operating in the country ‌without a gambling licence, the official state gazette showed on ​Tuesday. • In a statement, the ministry said its gambling watchdog had opened a probe into the U.S.-based companies for allegedly breaching local rules by lacking ‌mandatory administrative authorisation. • ⁠The ban will last an estimated three or four months until the probe's ⁠co ...