During periods of market volatility, investors often look at credit ratings as one way of evaluating how a company could hold up under stress. Tightening financial conditions can raise concerns about a company's ability to access capital markets, and a downgrade from investment grade to high yield can result in higher financing costs. In short, companies that hold an investment grade rating are often better-positioned to withstand the financial pressures of a downturn, and in recent years, midstream has largely improved its creditworthiness (read more). However, given the significant uncertainty for energy demand