OrangeX, BingX and HTX posted the three widest spreads in RootData's latest ranking of stock derivatives exchanges. The spreads, calculated on a 24-hour volume-weighted basis, were 0.318% for OrangeX, 0.298% for BingX and 0.292% for HTX. RootData said higher spread readings generally indicate higher trading costs, making the metric a useful gauge of execution quality for traders comparing venues.