Schlumberger’s (SLB) first-quarter financial results were released on April 20. On April 20–June 8, Schlumberger’s implied volatility fell from 24.1% to 20.7%. The company’s stock price increased 0.3%. Schlumberger accounts for 2.9% of the SPDR S&P Oil & Gas Equipment & Services ETF (XES), which provides exposure to the energy sector’s oil and gas equipment and service segment. XES rose 2% on April 20–June 8.