oil and nat gas has been relatively cheap for about 8 years. $100 oil, inflation adjusted, is not high. Oil is far off the inflation adjusted high of $181. Cheap oil and nat gas in the USA has been a huge benefit to the economy, many business that rely on oil, and the stock market. I saw a chart on CNBC this week that energy costs used to equal 10% of a family’s expenses, and over the last few years was about 5%, and it’s not too far above 5% now. This has resulted in more disposable income which has helped many industries. I have no clue if energy prices are sustainable, but settling above $100 is not out of the realm of possibilities……. At least until the next recession.