US markets recorded their third straight day of losses on August 18, 2026, as high Treasury yields and rising oil prices spooked investors. The tech-heavy Nasdaq index led the decline, raising concerns about borrowing costs and potential impacts on global equity sentiment.
US stock markets extended their losing streak to a third consecutive session on August 18, 2026, driven by a sharp sell-off in technology shares. The Nasdaq Composite fell by approximately 1.3% to 1.8%, while the S&P 500 declined nearly 0.7%, reflecting growing investor anxiety over the economic outlook.
The primary pressure on equity markets came from a surge in US Treasury yields. The 30-year yield reached its highest level since 2007, and the 10-year yield touched levels not seen since early 2025. Rising interest rates make it more expensive for companies to borrow money and reduce the present value of their future earnings, which disproportionately hurts high-growth technology companies that rely on future profit expectations.
Tech Sector Rout and Semiconductors
Technology stocks, particularly those linked to artificial intelligence and chip manufacturing, faced the heaviest selling. The Philadelphia Semiconductor Index, a major barometer for the chip sector, plunged roughly 5% in a single day. Major technology firms such as Micron Technology, Western Digital, Sandisk, Marvell Technology, and Intel experienced significant losses as sentiment soured.
In addition to interest rate concerns, geopolitical tensions have weighed heavily on investor confidence. The expiration of the 60-day US-Iran ceasefire without renewal has led to rising oil prices. Higher energy costs often translate into persistent inflation, complicating the Federal Reserve's path for interest rate adjustments. While this created a challenging environment for tech, the energy sector has moved in the opposite direction, with many energy-linked stocks gaining amid supply concerns.
Implications for Indian Investors
Indian market participants should monitor these developments as they often influence global risk sentiment. When US bond yields rise significantly, foreign institutional investors (FIIs) may pull capital out of emerging markets like India to shift funds into safer, higher-yielding US government bonds. This movement can put pressure on the Indian rupee and local equity markets.
Furthermore, Indian information technology companies, which have significant revenue exposure to the US, often show a high correlation with the Nasdaq. A sustained sell-off in US tech giants can sometimes trigger cautious sentiment in domestic IT stocks. Additionally, because India is a major importer of crude oil, rising global oil prices driven by geopolitical conflicts can negatively impact the country’s import bill, potentially leading to inflationary pressure and a wider current account deficit.
Investors are now looking ahead to the release of upcoming Federal Reserve meeting minutes, which may provide more clarity on the future direction of interest rates. With markets in a volatile state, tracking US yield movements and global geopolitical developments remains essential for understanding potential shifts in broader market liquidity.