Major indexes have rallied sharply, but several valuation signals are flashing warnings. Since late July, the S&P 500 has gained 6%, the Nasdaq Composite 9%, and the Dow Jones Industrial Average 4%. At the same time, the S&P 500 Shiller CAPE ratio has stayed above 40 since May 2026—a level previously sustained for months only during the dot-com bubble. The Buffett indicator now sits around 232%, also a record. According to a Bank of America global fund manager survey, roughly 45% of managers view an AI bubble as the biggest tail risk facing markets in 2026.
Against that backdrop, a handful of Nasdaq-100 names look unusually cheap. Micron Technology (MU), PDD Holdings (PDD), and Adobe (ADBE) trade at forward price-to-earnings ratios of about 6.5, just over 8, and 9, respectively, compared with roughly 21 for the average S&P 500 stock. Whether low valuations translate into resilience depends on the story behind each discount.
Micron has surged about 660% over the past year, yet its forward P/E sits at only 6.5. The discount mainly reflects the cyclical nature of the memory and storage industry. Micron has benefited from product shortages and rising prices, but investors are reluctant to assign a higher multiple because sales and profits could fall sharply once the shortage ends. The stock has already pulled back 25% from its high, with clear profit-taking in recent months. The low valuation offers some margin of safety, but the shares could still swing sharply if the cycle turns.
PDD has fallen 26% over the past year. Its Temu marketplace attracts consumers with low-priced goods, but the stock trades at a forward P/E of just over 8. The discount stems largely from U.S.-China tariffs, trade frictions, and slower growth. In the first quarter of 2026, PDD’s revenue rose 11% year over year, compared with 131% growth in the same period two years earlier. Slowing expansion combined with trade uncertainty makes the low valuation look more like risk compensation. Unless trade concerns ease meaningfully, the stock may remain under pressure.
Adobe is down 26% over the past 12 months and trades at a forward P/E of about 9. The market worries that generative AI sharply lowers the barrier to creating images, threatening demand for Adobe’s core software. Although Adobe reported record revenue of $6.6 billion in its second quarter, up 13% year over year, and continues to integrate AI into its products, the stock has not shaken doubts about long-term growth sustainability. The low valuation reflects uncertainty over AI disruption rather than a simple mispricing.
The common thread is that all three stocks trade below the market’s average forward earnings multiple, but each discount corresponds to a different risk: cyclicality, trade, and AI substitution. If the market pulls back on valuation worries or AI bubble fears, low valuations may reduce the downside, but they do not guarantee immunity to a broad sell-off. Cheap alone is not a reason to buy; the key is whether the risks have been fully priced in.
