The probability assigned to the "Yes" option in the "↑ 1.8" sub-market of Polymarket's "XRP August Price Prediction" event fell to 20.45% from 39.2% an hour earlier, a fluctuation of 18.75 percentage points, according to Catcher Predict monitoring. The move follows separate sharp repricing in the event's "↑ 1.6" sub-market, where the probability rose to 67.5% from 48.55%, and in the "Below $1.2" sub-market, where it increased from 29.5% to 68.5%. The rapid changes may reflect the impact of related breaking news.