Texas's attorney general announced on Friday a probe into Robinhood and 12 other online stock exchanges after they suspended trading on GameStop and other volatile equities. Ken Paxton, the top prosecutor for the country's second most-populous state, sent a civil investigative demand to the companies, the latest sign of escalating scrutiny from regulators and lawmakers over the trade suspensions. Trading of GameStop resumed Friday on Robinhood. Paxton echoed criticism from across the political spectrum of the trading halts, which he said "stinks of corruption" and appears to show coordination among powerful interests. jmb/cs