Iran's Ceasefire Crushes Vol as Single Names Splinter

June 29, 2026 · 10:39 ET

The Iran ceasefire delivered the relief the tape wanted — +1.11% on SPY, VXX down -2.80% on roughly 4× the typical pace — but underneath it the Market factor has all but vanished, explaining 0.2% of cross-sectional variance against a 10.2% yearly norm. This is an 84%-idiosyncratic session: names are trading on their own stories, and the index calm masks the widest single-stock dispersion of the quarter.
FactorReturnZ-Score5d Z20d Z63d ZCategoryDirection
Oil+0.41%+0.55-1.08-1.41-0.73Themeoil exposure outperforms
Semis-0.86%-0.94-1.70+0.20+0.51Themesemis underperform
Size+0.43%+1.49-2.20-1.40+0.40Stylelarge names outperform
Value-0.40%-1.65+0.10+0.00+0.18Stylecheapest names lag
Dividend Yield-0.35%-1.67-2.56-1.13+0.26Stylelower yield outperforms
Leverage-0.25%-1.38-0.14+0.32+0.73Stylelow leverage outperforms

A Relief Rally With No Index Inside It

Start with the macro trigger: +1.11% on SPY and a hard volatility crush — VXX -2.80% on roughly 4× the typical ETF pace — as Bloomberg reported U.S.–Iran hostilities fading and dip-buyers lifting beaten-down tech. But the residual structure tells a different story than the headline: the Market factor's share of cross-sectional variance collapsed to 0.2% today versus a 10.2% one-year average, with idiosyncratic variance at 84% (vs a 69% norm). That is the proprietary edge here — low Market share means high dispersion, a stock-pickers' tape where the index level is a poor summary of what stocks are doing. The 3.9× pace on IWB and 2.0× on IWD is consistent with index-flow activity feeding that dispersion rather than a clean directional bid.

Today's Sector Returns (Median Stock)
Communication Services leads on GOOGL/META while Materials lag — sector medians understate the single-name spread driving the tape.
Today's Sector Returns (Median Stock)
SectorMedian Ret Pct
Materials-1.56
Utilities-0.68
Real Estate-0.61
Consumer Discretionary-0.56
Consumer Staples-0.39
Health Care-0.15
Energy-0.10
Industrials-0.08
Financials-0.03
Information Technology0.66
Communication Services1.29

The Korea Headline Couldn't Lift Chips

The cleanest tell of the dispersion regime is what the "good news" didn't do. South Korea confirmed a reported $1.3 trillion AI and semiconductor build-out led by Samsung and SK Hynix Bloomberg, including roughly $600bn of fab expansion Financial Times — and the Semis factor still printed -0.86% at z=-0.94, extending a 5-day z of -1.7. The pain was in the highest-exposure names: MU -7.40%, SNDK -7.11%, INTC -5.95%, ARM -5.65%, with the AI/semis/data-center cohort (SMH/SOXX proxies) weighted roughly -5.6% in the factor's high-exposure bucket. EWY itself fell -3.03% — the project's domestic beneficiaries sold the news. None of this dents the structural run: SMH is still +60.59% over 63 days, so today is continuation of a stalling-out, not a break.

Bucket Return Profile — Semis z=-0.9
Negative slope agreement across horizons — high-semis-exposure names have been the consistent underperformers, with today's 1d monotonicity at -0.80.
Bucket Return Profile — Semis z=-0.9
BucketRet 1D PctRet 5D Norm PctRet 20D Norm PctRet 63D Norm Pct
10.75-0.220.142.68
20.270.570.562.55
30.270.640.332.08
40.490.230.391.75
5-0.090.840.081.58
6-0.041.120.971.91
70.130.220.141.55
8-0.050.600.071.09
90.101.101.171.25
10-0.091.450.690.34
11-0.170.83-0.520.04
120.761.540.170.91
13-0.321.330.471.70
140.080.930.701.38
15-0.230.870.211.54
16-0.800.690.961.81
17-0.570.380.481.37
18-0.66-0.060.251.72
19-0.55-1.080.172.20
20-0.56-2.36-0.823.87
ETFThemeToday1d Ago5d Ago20d Ago63d Ago
IGVsoftware+2.68%+4.06%-1.00%-7.82%+10.60%
XLYconsumer disc.+2.43%+0.90%-2.38%-6.30%+5.09%
KWEBchina+1.98%+1.31%-5.15%-10.20%-15.11%
SMHsemiconductors-0.35%-3.97%-7.32%+1.96%+60.59%
GDXgold-1.74%+1.76%-6.68%-11.68%-6.54%
VXXvolatility-2.80%+1.33%+3.33%-4.07%-35.66%
EWYsouth korea-3.03%-3.77%-10.00%-4.42%+64.41%

Mega-Caps Reclaim the Lead

The dip-buying that lifted the index was concentrated, not broad. Size flipped to z=+1.49 — large names outperforming — a sharp reversal of last week's small-cap lead (5-day z of -2.2). AMZN drove it with a +5.07% gain (+$130bn in cap) after AWS raised reserved GPU rates 20% on the back of record Prime Day spend The Wall Street Journal, alongside GOOGL +3.59% on its first day as a Dow component. Beneath the mega-caps the bid thinned out fast: IWM fell -0.91% and IJR -0.51%, so this is a top-of-the-cap-stack rally, not a risk-on broadening.

Bucket Return Profile — Size z=+1.5
Today's +0.78 size monotonicity cuts against a -0.66 read over 63 days — a one-day mega-cap snap inside a longer small-cap-friendly drift.
Bucket Return Profile — Size z=+1.5
BucketRet 1D PctRet 5D Norm PctRet 20D Norm PctRet 63D Norm Pct
10.17-0.98-0.512.23
2-0.450.330.222.21
3-0.350.450.632.47
4-0.480.790.682.21
5-0.210.890.801.82
6-0.331.550.962.26
7-0.301.250.991.90
8-0.250.940.501.43
9-0.231.140.701.56
10-0.190.280.021.31
11-0.110.730.211.51
12-0.190.810.322.03
130.190.620.471.09
140.090.08-0.011.18
150.130.380.101.33
160.240.500.050.92
170.270.200.081.35
18-0.080.020.251.57
190.470.32-0.120.75
200.34-0.680.302.19

Where the Dispersion Lives

The single-name catalysts are the session. Verizon fell -6.89% — the day's clearest idiosyncratic shock — as it exited the Dow with Alphabet taking its seat, the Motley Fool noting its $45.68 share price had shrunk to just 0.5% of the price-weighted index Motley Fool. With a 2.27 Dividend Yield loading, VZ's drop is the visible hand behind the Dividend Yield factor at z=-1.67 (lower yield outperforms) — a factor print that is really one name, the essence of an idiosyncratic tape. Comcast jumped 9% on the tax-free spin-off of NBCUniversal and Sky NYT. The Leverage factor (z=-1.38, low leverage outperforms) leaned on the rate-sensitive high-leverage cohort, with REITs soft across the board — IYR -0.80%, VNQ -0.83%, XLRE -0.99%.

Commodities and the Rate Backdrop

Oil posted the highest conditional importance of any factor (0.119) at a modest +0.41%, z=+0.55 — right-tail driven, with E&P names (XOP +1.07%, USO +1.36%) firming on dip-buying and LNG deal flow rather than a war premium, which the ceasefire is unwinding. A softer dollar helped at the margin — DXY -0.18% to 101.17 CNBC — though it wasn't enough for the metals: GLD -1.13%, SLV -1.37%, GDX -1.74%. Rates were a non-event: the 10-Year held at 4.38% (+0.6 bps) with the 2-Year at 4.11% (+2.1 bps) and the long end fractionally lower CNBC — there was no rate impulse behind the dividend-yield or leverage moves, reinforcing that those were stock-specific, not duration-driven.

Economic Context

The Dallas Fed Manufacturing Survey, released at 10:30 AM ET, showed the General Business Activity Index at 0.4 — unchanged from May and short of the 2.0 consensus, a second straight month of near-zero Texas factory growth. With the ceasefire and Thursday's payrolls in focus, equity futures held their gains through the print, and the regional miss left no mark on a tape already running on single-name flow.

Factor Regime Reference

Variance decomposition: live intraday — 20260629 session, bracketed against its trailing-year range. Factor returns are trailing through last close.

Variance explained — today vs its trailing-year range Each marker = factor's share of the session's total variance, ranked within its own past-year range. Variance mix (% of total) — today vs 1d ago vs 1-yr avg market style thematic idiosyncratic Today (live) 11% 84% 1d ago 24% 70% 1-yr avg 18% 69% box 25-75th · ticks 90th/max · marker=today · name green=up / red=down % of total · 1-yr range Semiconductors 2.96% · >90%tile Dividend Yield 1.13% · >90%tile Bitcoin / Crypto 0.86% · >90%tile Leverage 0.74% · >90%tile Size 2.14% · 75-90%tile Value 1.41% · 75-90%tile China 0.46% · 75-90%tile Short Interest 0.40% · 75-90%tile Morning Activity 0.23% · 75-90%tile Long-Term Momentum 1.72% · 50-75%tile Residual Volatility 1.20% · 50-75%tile Oil 0.48% · 50-75%tile

Trailing factor returns

FactorToday1d5d20d60d
Style
Dividend Yield-0.35% z-1.9-0.37%-0.60%-0.63%+1.13%
Value-0.40% z-1.5-0.38%+0.24%+0.37%+1.19%
One-Day Momentum+0.40% z+1.3-0.59%-0.12%+1.57%+3.56%
Leverage-0.25% z-1.3-0.24%+0.12%+0.36%+1.45%
Size+0.43% z+1.1-0.76%-1.95%-2.11%+0.38%
Short-Sale Activity-0.14% z-1.1+0.05%-0.22%-0.78%-3.85%
Short Interest+0.20% z+1.0+0.26%+1.06%+1.69%+2.04%
Growth+0.23% z+1.0+0.10%+0.46%+1.25%+1.95%
Morning Activity+0.15% z+0.9+0.06%-0.23%-1.21%-2.74%
Profitability-0.16% z-0.8-0.39%-0.51%+0.37%-0.10%
Medium-Term Momentum-0.20% z-0.7+0.13%+1.38%+2.78%+4.58%
Residual Volatility+0.32% z+0.7+0.72%-1.21%-4.52%-0.70%
Long-Term Momentum-0.41% z-0.6-1.66%+0.10%+1.26%+7.51%
Short-Term Momentum-0.17% z-0.5+0.19%+0.79%-0.99%-1.30%
Liquidity-0.09% z-0.3+0.39%-1.13%-2.08%+1.17%
Beta-0.28% z-0.3-1.78%-4.05%-0.99%+14.91%
Hedge-Fund Ownership+0.03% z+0.2+0.30%+0.61%+0.46%-0.85%
Thematic
Semiconductors-0.86% z-1.5-1.98%-1.34%+0.50%+5.48%
Oil+0.41% z+0.8-0.14%-2.06%-4.99%-3.70%
Bitcoin / Crypto-0.16% z-0.5+0.26%-0.56%-0.45%-1.16%
China-0.22% z-0.5+0.17%-0.90%-3.81%-6.87%
Treasury (Duration)-0.15% z-0.4+0.15%+0.79%+0.31%-1.90%
Gold+0.08% z+0.2+0.21%-1.31%-3.02%-6.89%

Data compiled by FactorPulse AI; edited and verified by Jeff Klein. For informational purposes only. Does not constitute financial advice, an investment recommendation, or an offer to buy or sell any securities. Always consult a qualified financial professional before making investment decisions.

For more on factor construction methodology, see www.factorpulse.com/glossary.

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