The structure of the week
The market was split along size lines this week. The S&P 500 rose 1.27% and the Nasdaq 100 rose 3.19%. The equal-weight S&P 500 fell 0.56% and small caps fell 0.75%. Over four weeks the gap is wider. The Nasdaq 100 is up 3.92% and the S&P 500 is up only 0.26%, while the equal-weight index is down 4.34% and small caps are down 4.66%. At the top the structure is holding. Both headline indices trade above their short, medium and long moving averages, and the Nasdaq 100 sits close to the upper edge of its volatility bands. Underneath, the average stock has slipped below its short-term moving average and lost pace. We read the structure as intact at the top and weakening beneath the surface.
The rotation
The sector ranking points the same way. Semiconductors rose 7.43%, the broader chip basket rose 5.86%, memory rose 3.86% and technology rose 3.52%. At the bottom, utilities fell 3.87%, energy fell 3.50%, long-dated Treasuries fell 2.38%, real estate fell 2.28%, gold fell 1.93% and financials fell 1.83%. Growth leading while defensive sectors fall is a risk-on pattern, but this one is narrow. Money is gathering in one theme instead of spreading across the market. High-yield credit also fell 0.85%, so credit is not confirming the appetite for risk that the chip rally suggests.
One week against four
Comparing the week with the month separates real trends from noise. Semiconductors, up 7.43% on the week and 12.59% over four weeks, and technology, up 3.52% and 5.70%, are continuing a trend that was already in place. The same is true on the downside. Utilities fell 3.87% this week and 7.54% over the month. Transportation fell 1.15% and 8.15%. Nuclear fell 1.77% and 10.45%. These are established declines that are still running. The contradictions matter more. Software rose 1.59% this week but is down 3.19% over four weeks. Retail rose 0.54% against a 5.09% monthly loss, and industrials rose 0.40% against a 3.79% loss. We read those as bounces inside falling trends, not turns. Oil is the opposite case: it fell 3.53% this week after rising 14.41% over the month, which is a trend losing momentum. Cybersecurity, down 0.27% on the week and up 2.43% over the month, shows a milder version of the same stall.
The crypto divergence
Crypto went up with the tech rally. Bitcoin rose 3.52% on the week and 8.15% over four weeks. Ethereum rose 1.83% and 11.31%. Solana rose 9.57% and 19.53%. The structure behind those moves is weaker than the returns suggest. All three are still in a downward medium-term structure, and all three trade well above short-term fair value. Solana is already above its upper volatility band. In short, crypto matches the risk-on tone of large-cap tech but not its structural strength. It looks like a stretched rebound inside a trend that has not yet turned.
What would change this read
Three things would change this read. First, if the equal-weight index and small caps regained their short-term moving averages and set a higher swing high, the narrow leadership we describe would become broad participation. Second, if semiconductors and the Nasdaq 100 fell back below their short-term averages, the only real engine of the week would be gone. The larger test for the S&P 500 is the swing low that has held since the last correction. Third, if high-yield credit went back to rising, it would remove the main warning sign. Crypto stays a bounce until its downward structure turns upward; losing the recent swing lows would confirm the downtrend.