Alex is a portfolio manager overseeing a large equity fund. In light of increased market volatility and potential economic uncertainty, Alex is considering various strategies to manage market risk within the portfolio. One strategy involves using options to hedge against potential declines in specific sectors that have underperformed recently. However, Alex wants to understand the different levels of risk exposure resulting from this strategy.
Which of the following statements best describes the concept of 'delta' as it relates to Alex's hedging strategy?