On July 17, Weatherford International’s (WFT) implied volatility (or IV) was ~65.2%. Weatherford International’s first-quarter earnings were announced on April 24. Since then, its implied volatility has increased from ~63.0% to its current level. Since April 24, WFT’s stock price has increased 23.0%. Implied volatility points to a stock’s potential movement, as viewed by investors.