On Thursday, United States Steel Corporation (NYSE:X) raised its second-quarter guidance above analyst expectations, with projected adjusted EBITDA of around $1.2 billion. In response, shares are up 2.4% to trade at $23.25 at last check, and the equity is seeing a surge in call volume today. Specifically, 85,000 calls have crossed the tape so far, which is 12 times the intraday average. Most of this activity can be attributed to the weekly 6/25 24-strike call, where new positions are being opened.