Group 1 - The article highlights that U.S. oil companies are cutting spending and reducing the number of active drilling rigs due to increased costs from tariffs on steel and aluminum, and falling oil prices, signaling the potential end of a decade-long shale boom [1][3] - OPEC+ unexpectedly decided to increase oil production, exacerbating the downturn in the U.S. oil market and raising concerns about a new price war, leading analysts to lower production forecasts [3] - The Dallas Federal Reserve's quarterly energy industry survey indicates that shale oil producers need oil prices to reach $65 per barrel to break even, while current prices have dropped to $61.53 per barrel, approximately 23% lower than this year's peak [3] Group 2 - The article notes that the decline in production will end significant growth in the U.S. energy sector, which has benefited from the shale revolution that provided cheap oil and gas, improved trade balance, and reduced dependence on foreign suppliers [3] - Former CEO of Pioneer Natural Resources, Scott Sheffield, stated that if oil prices fall to $50 per barrel, U.S. oil production could drop by 300,000 barrels per day, exceeding the total production of some smaller OPEC members [4] - Data from Baker Hughes shows that the number of active U.S. land oil rigs decreased by 10 to 553, down 26 from the same time last year, indicating a decline in drilling activity [4]