Sherwin-Williams ($SHW) is this scan's biggest reversal in either direction: last scan it was the sector's worst decliner with a freshly confirmed death cross; this scan its RSI jumped from 43.2 to 63.3 (the largest swing in the group), its trend classification flipped from strong-down to up, its weekly print swung from -4.17% to +11.24% — best in the sector — and its 30-day change turned positive. Ecolab ($ECL) and DuPont ($DD) also swung decisively positive on both weekly and 30-day measures. But two names moved the other way: Dow ($DOW) and LyondellBasell ($LYB), the two 30-day bounce leaders from the prior scan, now carry the sector's worst weekly declines (-5.32% and -4.85%) and both widened their distance from their 52-week highs. Air Products ($APD) turned negative on the week even as its 30-day gain extended to the sector's best.

Data as-of 2026-07-28 close (all eight tickers, current); scan run 2026-07-28. All numbers from precomputed summaries/chemicals.json. Comparison scan: 2026-07-25-chemicals (2026-07-24 close).

Four names in the sector staged real turnarounds this scan. Sherwin-Williams is the standout: after breaking down hard last scan (worst weekly decliner, trend downgraded to strong-down, death cross confirmed), it posted the sector's biggest RSI jump and best weekly gain, and its 30-day change flipped positive. Ecolab followed a similar arc — RSI up nearly 13 points, weekly print swinging from -1.5% to +7.08%, 30-day change flipping positive — and DuPont's trend recovered from weak-down to strong-up with its 30-day change also turning positive. PPG posted a smaller but real improvement, turning its weekly print positive while still working off a negative 30-day change.

The other side of the sector went the opposite direction. Dow and LyondellBasell had been the two names carrying the cluster's clearest bounce story two scans running — both flipped their 30-day changes positive last scan for the first time. This scan, both posted the sector's worst weekly declines (Dow -5.32%, LyondellBasell -4.85%) and both widened their distance from their 52-week highs, even though their 30-day changes are still positive (Dow +3.33%, LyondellBasell +8.58%, still the sector's best on that measure). Air Products, the sector's steadiest large-cap structure across the last several scans, turned negative on the week for the first time in a while, though its 30-day gain extended to 8.6%, now the best in the group. Linde is the one name that didn't participate either way — still weak-down trend, roughly flat on all the short-term measures.

• Dow: RSI 45.7→40.6 (weakened further), trend unchanged (down), 7D -0.27%→-5.32% (worst weekly decliner in the sector), 30D +1.57%→+3.33% (still positive), 52wkHi -27.7%→-32.5% (widened, worst in sector).
• LyondellBasell: RSI 53.5→45.9 (dropped below 50), trend unchanged (weak-down), 7D +1.94%→-4.85% (turned negative), 30D +7.48%→+8.58% (extended, best in sector), 52wkHi -26.47%→-30.64% (widened).
• Sherwin-Williams: RSI 43.2→63.3 (largest swing in the sector), trend recovered strong-down→up, 7D -4.17%→+11.24% (worst decliner to best gainer), 30D -4.69%→+2.9% (flipped positive), 52wkHi -18.2%→-6.69% (narrowed sharply, near-tightest in sector); death cross flag remains in place despite the reversal.
• Air Products: RSI 54.4→49.3 (softened), trend unchanged (strong-up), 7D +0.76%→-1.19% (turned negative), 30D +7.53%→+8.6% (extended, now best in sector), 52wkHi -6.54%→-6.99% (roughly flat, still tightest in sector).
• Linde: RSI 46.7→46.2 (flat), trend unchanged (weak-down — the one name that hasn't upgraded), 7D -0.18%→+1.22% (turned positive), 30D -0.67%→+0.02% (flipped to roughly flat), 52wkHi -7.64%→-6.75% (narrowed).
• Ecolab: RSI 48.2→61.1 (sharp recovery), trend upgraded weak-up→up, 7D -1.5%→+7.08% (reversed), 30D -2.73%→+1.54% (flipped positive), 52wkHi -14.92%→-8.53% (narrowed sharply); death cross flag remains in place despite the recovery.
• PPG: RSI 48.5→53.9, trend unchanged (strong-up), 7D -1.16%→+2.85% (turned positive), 30D -4.12%→-1.57% (improved, still negative), 52wkHi -14.75%→-10.81% (narrowed).
• DuPont: RSI 49.6→56.5, trend recovered weak-down→strong-up, 7D +1.78%→+1.43%, 30D -0.09%→+3.71% (flipped positive), 52wkHi -13.03%→-10.89% (narrowed).

RSI (Relative Strength Index) gauges how aggressively a stock has been bought or sold over roughly the past two weeks, on a 0-100 scale — under 30 signals an oversold, potentially undervalued stretch; over 70 signals overbought, extended risk; readings in between are neutral. The color icons below track that scale: green marks oversold/healthy, yellow marks neutral, orange marks approaching overbought, red marks a breakdown or extreme overbought reading. Trend reflects a stock's structural direction based on its moving averages (strong-up, weak-up, weak-down, strong-down); vs SMA20 shows how far price sits above or below its 20-day average; 52wkHi shows the distance below the stock's own one-year high — the closer to zero, the closer to a new high.

SHW, ECL, DD — THE SECTOR'S TURNAROUND STORIES: Sherwin-Williams ($354.27, RSI 63.3, was 43.2) posted the largest RSI swing and best weekly gain in the sector this scan, a full reversal from last scan's breakdown (worst decliner, trend downgrade, confirmed death cross). Ecolab ($282.90, RSI 61.1, was 48.2) posted a similarly sharp recovery, and DuPont ($140.77, RSI 56.5, was 49.6) saw its trend classification recover from weak-down to strong-up with its 30-day change flipping positive. All three still carry a technical death-cross overhang from prior scans (SHW and ECL) or had only just recovered structurally (DD) — the price action has moved faster than the moving-average configuration in each case.

DOW AND LYB — THE PRIOR SCAN'S BOUNCE LEADERS, NOW THE SECTOR'S LAGGARDS ON DIRECTION: Dow ($28.85, RSI 40.6) and LyondellBasell ($58.22, RSI 45.9) were the two names whose 30-day changes flipped positive for the first time last scan. This scan, both posted the sector's worst weekly declines (Dow -5.32%, LyondellBasell -4.85%) and both widened their distance from their 52-week highs (Dow to -32.5%, the sector's worst; LyondellBasell to -30.64%). Their 30-day changes are still positive — LyondellBasell's is the sector's best at +8.58% — but the direction of the last two weeks has clearly turned against them.

APD COOLS, LIN STAYS FLAT: Air Products ($292.85, RSI 49.3, was 54.4) turned negative on the week for the first time in several scans, even as its 30-day gain extended to 8.6%, the sector's best. Linde ($511.18, RSI 46.2) is essentially unchanged across every short-term measure and remains the only name in the sector that hasn't upgraded out of weak-down trend.

PPG — SMALLER BUT REAL IMPROVEMENT: PPG ($119.01, RSI 53.9) turned its weekly print positive (+2.85%, was -1.16%) and narrowed its 52-week-high gap, though its 30-day change (-1.57%) is still negative, improved from -4.12%.

Does Sherwin-Williams' reversal hold, and does its death cross flag resolve now that price has decisively cleared both moving averages? Do Dow and LyondellBasell's negative week mark the start of a real pullback, or a one-scan wobble inside their broader bounce? And does Linde, the one name that hasn't participated in either direction, finally break out of its weak-down trend, or does it keep drifting flat while the rest of the sector rotates around it?

• Tape data (price/RSI/SMA/returns): pre-computed summaries as of the 2026-07-28 close — chemicals.
• Comparison figures: 2026-07-25-chemicals (2026-07-24 close).