What bets are lawmakers and staffers making on prediction markets? They're not required to tell us.

A new bill from Sens. Todd Young and Elissa Slotkin would amend government ethics rules to require disclosure of trades made on prediction markets. Daniel Heuer/Bloomberg via Getty Images; Spencer Platt/Getty Images There are concerns about potential insider trading by government officials on prediction markets. But government ethics rules don't require lawmakers or staffers to disclose their bets. Two senators recently introduced a bill to change that — but there are some potential downside...