The US shale oil revolution transformed global energy markets, strengthened American energy independence and helped support a period of lower inflation and rising financial asset valuations. However, slowing production growth and the depletion of the most productive drilling areas could signal a turning point, with potential consequences for oil prices, the US dollar and the wider economy.
The Rise of US Shale Oil
Advances in hydraulic fracturing, known as fracking, combined with horizontal drilling, made it commercially viable to extract oil and gas from shale formations that had previously been difficult to access.
Between 2010 and 2020, US shale fields added more than 7 million barrels of oil per day to global supply. By late 2019, American oil production had reached nearly 13 million barrels per day, accounting for around 13% of worldwide output.
The expansion also transformed the US natural gas market, moving it from a position of potential shortages towards a sustained surplus. Lower domestic energy costs helped businesses and consumers, while increased production reduced the country’s reliance on imported energy. By 2019, the US had become a net energy exporter.
How Cheap Energy Supported US Markets
The growth of shale production had wider economic implications beyond the energy sector. Increased supply helped limit global oil prices, while abundant domestic natural gas provided US businesses with a cost advantage.
Lower energy costs contributed to reduced inflationary pressure, supporting an economic environment in which businesses could maintain margins and consumers benefited from lower fuel costs. Combined with accommodative monetary policy, these conditions helped support financial asset valuations.
The energy revolution also influenced the relationship between oil prices and the US dollar. As American energy production expanded, higher oil prices increasingly benefited domestic producers and improved the country’s energy trade balance. This helped change the traditional relationship between oil prices and the dollar.
These developments contributed to the period of US economic and financial market outperformance commonly described as US exceptionalism.
Signs of Slowing Production Growth
Although total US crude oil production remains at record levels, the rate of growth has slowed considerably. One of the main challenges is the gradual depletion of the most productive drilling locations.
During the shale boom, producers concentrated on the highest-quality acreage, where wells offered the strongest returns. After years of intensive drilling, these areas are becoming depleted, forcing companies to explore less productive locations that can be more expensive to develop.
Production has begun to plateau in established shale regions such as the Bakken and Eagle Ford formations. Rising break-even costs have also made the industry less suited to the debt-funded expansion that characterised its earlier years.
Following periods of sharply lower oil prices, producers shifted towards more disciplined capital spending, reducing drilling activity and returning more cash to shareholders. This approach may support financial discipline, but it also limits the pace at which new supply can be brought to market.
The implications extend beyond individual producers. If shale output growth remains subdued, the industry may be less able to respond quickly to increases in global demand.
Ruffer Investment Company Limited (LON:RICA) is a British investment company dedicated to investments in internationally listed or quoted equities or equity related securities
