Karla Barker 
The phrase “paradigm shift” gets thrown around a lot in markets. But sometimes what looks like a fundamental change is just a rapid rotation between fashionable assets. The AI-driven semiconductor boom is a perfect example.
Hyperscalers like Amazon (AMZ) and Google (GOOG) are pouring billions into data centers packed with AI accelerators. These systems need huge amounts of high-bandwidth memory for processing and NAND flash for storage. That has tightened supply and pushed chip prices higher.
Memory makers soared then stumbled
Micron Technology (MU) makes DRAM, NAND, and other memory products. Sandisk (SNDK) focuses on NAND flash and solid-state storage. Micron rose roughly 700% year over year. Sandisk gained more than 4,000%. But both have since retreated from their peaks. It shows how quickly enthusiasm can reverse—perhaps even more quickly than it built up.
The excitement also spawned the largest U.S. IPO ever in SpaceX (SPCX). SK Hynix (00060), a leading supplier of high-bandwidth memory, raised $26.5 billion through the biggest U.S. listing by a foreign company. Its ADRs initially surged. But volatility soon exposed the risks of buying into peak optimism. SK Hynix ADRs are down 15% during Asia market hours.
Gold and silver followed a similar pattern
Precious metals rode the “debasement trade”—the belief that government borrowing, money creation, and inflation will erode fiat currencies. Silver rose more than $120 in January 2026 before retreating as much as 50%. Gold saw a milder reversal, but the direction was similar.
Strategy (MSTR), the largest corporate holder of bitcoin, had its own version of a paradigm shift with what some called the “infinite money glitch.” The company issued shares above the value of its bitcoin holdings and used the proceeds to buy more bitcoin. It worked for a while. But Strategy has since fallen roughly 80% from its peak. That premium over net asset value has contracted sharply, now close to zero.
The real lesson for investors
The takeaway isn’t that these trends are fake. AI chips probably are changing computing. Bitcoin probably is changing finance. The lesson is that structural trends can be real while their valuations remain cyclical. Enthusiasm can push prices far beyond any reasonable estimate of future cash flows. And when sentiment turns, the correction can be brutal.
It is something to keep in mind the next time someone calls a rally a “paradigm shift.” Maybe it is. But even paradigm shifts have their painful pullbacks.