In a high-stakes hearing, conservative justices raised significant questions about the legality of Trump's tariffs. A ruling against these tariffs could have major financial implications, potentially requiring the US to refund billions collected from them. This case is crucial as it could reshape trade policies and impact the economy.

The U.S. transportation secretary has announced a plan to reduce flight traffic by 10% at 40 airports as a response to the ongoing shutdown affecting air-traffic controllers. This decision aims to alleviate the burden on unpaid controllers and ensure safety in the skies. While this reduction may lead to some delays and inconveniences for travelers, it highlights the government's efforts to address the challenges posed by the shutdown and maintain operational efficiency in air travel.

The Brazil central bank has decided to maintain its current interest rates, emphasizing a 'very prolonged' pause in monetary policy adjustments. This decision is significant as it reflects the bank's cautious approach to managing inflation and supporting economic growth amidst ongoing uncertainties. By holding rates steady, the central bank aims to provide stability in the financial markets and reassure investors about Brazil's economic outlook.

The U.S. is facing a potential 10% cut in air traffic by Friday if a shutdown deal isn't reached, according to sources. This situation is concerning as it could lead to significant disruptions in travel plans for millions of passengers and impact the economy. The looming threat of reduced air traffic highlights the urgent need for lawmakers to come together and find a resolution to avoid further complications.

DoorDash, the leading food delivery service in the US, has announced plans to invest several hundred million dollars in 2026 following a strong performance in third-quarter orders. This investment aims to enhance their internal tools and launch new initiatives, signaling confidence in their growth and commitment to improving customer experience. Such moves are crucial as they not only reflect the company's positive trajectory but also indicate a competitive edge in the rapidly evolving food delivery market.

Nvidia's CEO Jensen Huang has expressed concerns that China may outpace the US in the AI race, criticizing Western cynicism while highlighting China's recent moves to ease regulations and reduce energy costs for data centers. This statement is significant as it underscores the growing competition in AI technology between the two superpowers, raising questions about the future landscape of innovation and economic power.

Oil futures have taken a hit due to a significant rise in U.S. crude inventories, raising concerns about weaker demand and oversupply in the market. This decline is important as it reflects broader economic trends and could impact fuel prices and energy markets globally.

U.S. natural gas futures have ended their five-day winning streak as forecasts indicate a shift to milder weather following an anticipated cold snap next week. This change is significant because it could impact energy prices and supply, reflecting the sensitivity of the market to weather conditions.