FTSE 100 Flat Ahead of US Inflation Data and Nvidia Results

London's FTSE 100 index held flat at 10,875.87 points by 1027 GMT on Wednesday, as falling oil prices dragged energy stocks lower, offsetting gains elsewhere, while investors awaited U.S. inflation data and Nvidia's quarterly results. The midcap FTSE 250 rose 0.3%, and Nvidia's stock has surged more than 200% over the past year, making its earnings a bellwether for AI infrastructure spending.

August 26, 2026, Inside AI — London's FTSE 100 index held flat on Wednesday as falling oil prices dragged energy stocks lower, offsetting gains elsewhere. Investors kept their focus on upcoming U.S. inflation data and quarterly results from Nvidia, the chipmaker at the center of the artificial intelligence boom. The blue-chip index was little changed at 10,875.87 points by 1027 GMT . The midcap FTSE 250 rose 0.3% , showing more resilience among domestic-focused companies. Energy shares weighed on the FTSE 100 after crude prices slid. BP and Shell, two of the index's largest constituents, traded lower. The decline reflected broader concerns about global demand and supply dynamics, not a sudden shift in corporate fundamentals. The market's attention now turns to the U.S. Personal Consumption Expenditures price index, the Federal Reserve's preferred inflation gauge. Economists expect the data to show inflation cooling, but any upside surprise could force the central bank to keep rates higher for longer. Nvidia's earnings, due after the U.S. market close, carry outsized significance. The company has become a bellwether for AI infrastructure spending. Its results will signal whether demand for AI chips remains robust or if the sector faces a correction. Nvidia's stock has surged more than 200% over the past year, making it one of the most valuable companies in the world. Its guidance will be parsed for clues about data center spending, supply chain constraints, and competition from rivals like AMD and custom silicon from hyperscalers. European markets have struggled for direction in recent weeks. The FTSE 100 has underperformed global peers this year, partly due to its heavy exposure to commodity-linked sectors. A stronger pound has also pressured the index's many dollar-earning multinationals. The Bank of England's rate path adds another layer of uncertainty. Traders have scaled back expectations for aggressive cuts after sticky services inflation. That has supported sterling but hurt exporters. Analysts say the FTSE 100's flat performance masks a rotation beneath the surface. Defensive sectors like healthcare and utilities have attracted inflows, while miners and energy stocks have lagged. Investors are positioning for a potential slowdown in global growth. Oil prices fell after industry data showed a surprise build in U.S. crude inventories. Brent crude slipped below $80 a barrel, extending a losing streak. Lower oil prices typically reduce revenue for energy companies, which account for about 13% of the FTSE 100's market capitalization. The midcap FTSE 250's gain of 0.3% suggests investors still see value in UK-focused businesses. The index has outperformed the FTSE 100 in recent months as the domestic economy shows signs of stabilization. U.S. stock futures were little changed ahead of the inflation report and Nvidia's results. The S&P 500 and Nasdaq have rallied this year, driven by a handful of mega-cap technology stocks. Nvidia alone has contributed a significant share of those gains. If Nvidia's earnings disappoint, the ripple effects could hit global markets. AI-related stocks in Europe, including ASML and Infineon, would likely face selling pressure. Conversely, a strong report could reignite the AI trade. The U.S. inflation data will also shape expectations for the Fed's September meeting. Futures markets currently price a 60% chance of a quarter-point rate cut. A hotter inflation print would reduce those odds and strengthen the dollar, pressuring commodity prices further. For UK investors, the combination of U.S. data and Nvidia's results creates a binary risk event. The FTSE 100's flat close on Wednesday may simply be the calm before a more volatile session on Thursday. Beyond the immediate catalysts, the longer-term question is whether AI spending can justify current valuations. Nvidia's data center revenue has grown at triple-digit rates, but some analysts warn of an inventory correction if cloud providers slow their capital expenditure. The FTSE 100's energy-heavy composition means it is less exposed to the AI trade than U.S. indices. That has been a drag this year but could provide a cushion if tech stocks sell off. The index's dividend yield of about 3.5% also attracts income-seeking investors. As the session progressed, trading volumes remained light. Many investors were waiting for the U.S. data before committing capital. The FTSE 100's range was narrow, reflecting a market in wait-and-see mode. The pound traded at $1.32 , near its highest level in two years. Sterling strength has been a headwind for the FTSE 100, as roughly 70% of index earnings come from overseas. A strong pound reduces the value of those earnings when converted back to sterling. Looking ahead, the FTSE 100's direction will hinge on whether U.S. inflation data supports a September rate cut and whether Nvidia's guidance sustains the AI rally. Both events carry the potential to move markets sharply in either direction.