The semiconductor cycle is the recurring pattern of boom and bust in chip demand, pricing, capacity, and profitability that has characterized the industry for decades. Cycles typically last 3-5 years from peak to peak.
The Cycle Pattern
Phase 1 - Upturn: Demand increases, inventories tighten, lead times extend, prices rise. Companies increase wafer starts. Phase 2 - Boom: Demand exceeds supply. Shortages and allocation. Record revenue and profits. Companies order new equipment and plan fab expansions. Phase 3 - Correction: Demand softens or new capacity comes online. Customers work down excess inventory. Lead times shorten, prices decline. Phase 4 - Downturn: Oversupply. Utilization drops, margins compress. Companies cut capex, reduce wafer starts, delay fab construction.
What Drives the Cycle
Demand volatility: End-market demand (PCs, phones, autos, servers) fluctuates with economic conditions and technology transitions. Capacity lag: New fabs take 2-3 years to build. Capacity decisions made during boom times deliver supply during downturns. Inventory dynamics: Customers over-order during shortages (creating phantom demand) and destock during corrections (amplifying the downturn). Memory amplification: DRAM and NAND markets are highly commoditized, making memory the most cyclical segment.
Historical Cycles
Major downturns occurred in 2001 (dot-com bust), 2008-2009 (financial crisis), 2019 (inventory correction), and 2022-2023 (post-COVID correction). Major booms in 2017-2018 (crypto/data center), 2020-2021 (pandemic demand), and 2024-2025 (AI demand).
The AI Exception?
The current AI-driven demand cycle is unusually strong and sustained, leading some analysts to argue this cycle is different. However, history suggests all booms eventually moderate—the question is when and how severely.