Semiconductor Rally Reaches Dot-Com-Like Extremes

Semiconductor stocks are now at their most overbought levels since the peak of the Dot Com bubble, with sector indices and ETFs showing stretched technical readings relative to long-term trends. Momentum has been fueled by intense enthusiasm around AI, data centers, and advanced manufacturing capacity.

Historically, similar overbought phases in the Philadelphia Semiconductor Index (^SOX) have preceded sizable drawdowns, including the 2000 peak, the 2010-2011 cycle high, and the 2017-2018 run-up. In those periods, elevated valuations combined with aggressive capex and optimistic demand assumptions eventually gave way to earnings disappointments and position unwinds.

Current conditions place particular focus on high-profile chip designers such as NVIDIA (NVDA) and Advanced Micro Devices (AMD), whose premium multiples and central roles in AI infrastructure make them key drivers of sector sentiment. Large manufacturing and equipment names including Taiwan Semiconductor Manufacturing Company (TSM) and ASML Holding (ASMLa) also sit at the heart of this cycle, as their order books and utilization rates are tightly linked to broad chip demand.

Past episodes show that when semiconductor sectors reach extremes comparable to prior cycle peaks, subsequent reversals can be both sharp and extended, ranging from roughly 25-30% pullbacks to multi-year drawdowns of 75-80%. The current setup therefore reflects a classic late-cycle configuration in which any shift in AI or data-center spending expectations could translate quickly into valuation compression across leading semiconductor names and sector ETFs.