S&P 500 and Nasdaq hit highs

U.S. stocks are doing something that usually looks harder than this. The S&P 500 and Nasdaq just printed new records even as oil stayed elevated and the inflation backdrop kept getting worse, not better. That tells you where the market’s center of gravity is right now — a small cluster of AI and semiconductor names. The news is simple: on Monday, May 11, those stocks were strong enough to drag the major indexes to fresh highs, and by Tuesday the market was already stress-testing whether that move could survive hotter CPI and another jump in crude. ### Why did indexes hit highs at all? Because the market is still paying up for growth that looks real. Chip stocks and AI-linked tech names have been delivering strong earnings, strong guidance, and a story investors still believe — that companies are spending aggressively on data centers, memory, and computing power. That was enough to push the S&P 500 to 7,428.97 and keep the Nasdaq near its own records on May 11. (schwab.com) ### Which stocks are doing the heavy lifting? Mostly semis. Nvidia kept acting like the flagship. Micron and Sandisk had already exploded higher the previous week, and the Philadelphia Semiconductor Index was up 55% in the second quarter by May 8. That is a huge move in a very short time, and it explains why the indexes can look healthy even when a lot of other stocks are just okay. (tradingeconomics.com) ### So why didn’t oil kill the rally? Because markets were willing to treat oil as a macro problem for later, not a profit problem for today. Brent stayed above $100, and West Texas Intermediate jumped above $102 on May 12 as U.S.-Iran tensions worsened and the Strait of Hormuz stayed central to the story. But investors were still more focused on earnings momentum and AI demand than on the possibility that higher energy costs could bleed into everything else. (money.usnews.com) ### What changed on Tuesday? Inflation finally forced the issue. April CPI came in at 3.8% year over year, a touch above the 3.7% economists expected, while monthly headline CPI rose 0.6%. The S&P 500 then slipped 0.16% to 7,400.96 and the Nasdaq fell 0.71% to 26,088.20. Same market, different mood — because once inflation runs hot with oil already surging, investors start wondering if the Fed stays pinned for longer. (money.usnews.com) ### Why does “narrow leadership” matter? Because a record index can hide a fragile market underneath. If a handful of giant tech and chip names are doing most of the work, any wobble in that group matters more than usual. Schwab flagged weak breadth and a rise in volatility even as indexes made highs — basically a sign that the surface looked calm while the internals looked less convincing. (cnbc.com) ### Is this still an earnings story or a macro story? Both, but the balance is shifting. Last week, earnings and AI spending were enough to overpower worries about oil. This week, hotter inflation means macro is pushing back. If energy costs keep feeding into core prices, the market has to think less about “how fast can earnings grow?” and more about “how long do rates stay restrictive?” (schwab.com) ### What should investors actually watch now? Watch whether leadership broadens beyond semis and megacap tech. If more sectors join in, records look sturdier. If not, every CPI surprise, oil spike, or rates repricing becomes a direct threat to the whole tape. The bottom line is that stocks are still climbing, but the rally is asking a very small group of companies to carry a very large load. (money.usnews.com)