The structure of the week
The headline indices held up better than the market underneath them this week. The Nasdaq 100 rose 0.68% and is up 4.26% over four weeks. Price is pressed against its upper volatility band and back at the 748.65 swing high. The S&P 500 slipped 0.22% and is flat over the month at -0.07%. The equal-weight S&P 500 fell 0.65% and is down 4.23% over four weeks, and the Russell 2000 fell 0.16% and is down 4.90%. We read the cap-weighted structure as still upward, with price above its rising medium-term moving averages. However, momentum on the S&P 500 has rolled over, and both the equal-weight index and small caps have slipped below their short-term averages. The structure is holding at the top and weakening underneath.
The rotation
Leadership is narrow and sits almost entirely in technology. Cybersecurity rose 4.00%, semiconductors (SMH) 3.96%, the broader chip basket (SOXX) 2.83%, software 2.28% and technology 1.80%. The bottom of the table is not a simple cyclical-versus-defensive split: gold fell 3.37%, China tech 2.93%, nuclear 2.87%, health care 2.65%, financials 2.46% and long-dated Treasuries 2.32%. Staples fell 1.86% and real estate 1.80%, so this is not a defensive rotation either. Money is leaving bonds, gold, staples and financials at the same time and crowding into a handful of technology groups. We see that pattern as breadth narrowing: risk appetite is alive, but in fewer places. High yield credit fell 1.22%, so credit is not confirming the index strength.
One week against four
The four-week comparison sharpens the picture. In semiconductors the week continues the trend: SOXX rose 2.83% on the week and 13.28% over four weeks, and SMH rose 3.96% and 11.21%. Several of this week's gainers are only bouncing inside downtrends. Utilities rose 0.81% on the week but are down 7.54% over four weeks. Transportation rose 1.07% against a four-week loss of 4.72%, and energy rose 1.47% against a four-week loss of 1.73%. These are bounces, not turns, and utilities and transports still trade below their short-term averages. Oil shows the opposite case: it fell 0.65% on the week while still up 3.81% over four weeks. Memory fell 0.21% on the week and is up 3.50% over the month. Those are trends losing pace. Financials, down 2.46% on the week and 7.93% over four weeks, and nuclear, down 2.87% and 14.35%, are simply continuing lower.
The crypto divergence
Crypto has moved with the four-week tech leadership but not with this week's. Bitcoin is up 5.01% over four weeks but slipped 0.10% on the week. Ether is up 6.12% over the month and fell 0.69% on the week, and solana is up 10.88% over four weeks and fell 3.30% on the week. Bitcoin has climbed from the 57,748 swing low back above the 82,792 swing high. Price now sits near the top of its volatility band, stretched well above fair value, and short-term momentum has dropped quickly from overbought. The broader trend has not yet turned up. Over the month, crypto lines up with equities; on the week it diverges, pausing while semiconductors sped up.
What would change this read
A few levels decide whether this read stays valid. On the S&P 500, the trailing volatility level near 729.88, just above the lower band at 727.73, is the line between a narrow uptrend and a broken one. For the Nasdaq 100, failing back below the 748.65 swing high, with price already stretched, would point to exhaustion. The Russell 2000 sits just above its trailing level near 279.98, and a break there would make the small-cap weakness structural. In the other direction, the equal-weight index reclaiming its short-term averages would broaden participation and undo the narrowing read. In crypto, a move back below 82,792 and toward the trailing level near 71,141 would mark the rebound as a bounce within a larger downtrend.