Energy vs Technology
XLE (Energy Select Sector SPDR) tracks energy sector with top weights ExxonMobil ~22 percent, Chevron ~15 percent. XLK (Technology Select Sector SPDR) tracks tech with top weights AAPL, MSFT, NVDA, AVGO, ORCL combined ~65 percent.
Also known as: Energy (XLE) (ETF_XLE, energy sector) · Technology (XLK) (ETF_XLK, tech sector)
Why This Comparison Matters
XLE (Energy Select Sector SPDR) tracks energy sector with top weights ExxonMobil ~22 percent, Chevron ~15 percent. XLK (Technology Select Sector SPDR) tracks tech with top weights AAPL, MSFT, NVDA, AVGO, ORCL combined ~65 percent. April 2026: WTI $95.85 (Iran war oil shock); XLK $155.03 (AI capex). The XLE/XLK ratio captures the ultimate old-vs-new economy rotation. Energy outperforms during inflation regimes, commodity supercycles, supply shocks. Tech outperforms during disinflation, growth scarcity, AI capex booms. April 2026 setup unusual: both rallying together as Iran war boosts energy + AI capex narrative continues. Pair captures dispersion within new equity dominance regime.
The April 2026 Configuration
XLE near 52-week highs (estimated +20-25% YTD on Iran war). WTI $95.85 (April 2026, +30% from January 2026). XLK $155.03 (April 21 2026, near recent highs).
XLE/XLK ratio approximately 0.55 (estimated). 12-month range 0.50-0.65. Long-term range varies: 2008 commodity peak XLE/XLK >2.0; 2020-2021 zero-rate AI bull XLE/XLK <0.30; 2022 Russia + tech bear XLE/XLK >0.85; 2024 AI bull XLE/XLK <0.45; 2026 Iran war XLE/XLK ~0.55.
The combined April 2026 reading: rare configuration where both XLE and XLK are rallying. XLE on Iran oil shock; XLK on AI capex narrative continuation. Configuration suggests inflation regime + AI capex coexisting. Watch for: which dominates if Iran ceasefire compresses oil; which catalyst exhausts.
How XLE and XLK Embody Old-vs-New Economy
XLE and XLK represent fundamentally different economic exposures.
XLE composition: integrated oil majors (XOM, CVX) ~37%; E&P (COP, EOG, OXY, PXD) ~25%; oil service (SLB, HAL, BKR) ~10%; refiners (MPC, VLO, PSX) ~12%; midstream (KMI, OKE, WMB) ~8%; integrated gas + renewables ~8%. Cyclical, capital-intensive, dividend-paying mature industries.
XLK composition: AAPL ~17%, MSFT ~14%, NVDA ~10%, AVGO ~6%, ORCL ~4%, plus other tech. Combined top 5 ~50%. Growth-oriented, capital-light (relative), R&D-driven, low-dividend (XLK ~0.7% vs XLE ~2.5%).
The practical implication: XLE/XLK rotation reflects macro regime. Inflation regime = XLE outperforms (commodity hedge + cyclical earnings). Disinflation/AI regime = XLK outperforms (multiple expansion + growth scarcity + AI capex). The 2024-2026 era saw both rally simultaneously due to dual narratives.
How XLE and XLK Diverge
Inflation regime: XLE outperforms XLK substantially. 2021-2022: XLE +50%; XLK -28%. XLE/XLK ratio +90% peak-to-peak.
Disinflation regime: XLK outperforms XLE. 2009-2014: XLE -20%; XLK +200%. XLE/XLK ratio -73% peak-to-peak.
AI capex regime: XLK outperforms XLE through earnings revisions despite higher rates. 2023-2024: XLK +75%; XLE +5%. XLE/XLK ratio -40%.
Commodity supercycle + AI: rare. April 2026 setup with both rallying. Iran war + AI capex coexisting.
Long-run correlation between XLE and XLK: 0.30-0.50 (modest positive). They share market beta but diverge on macro regime.
The 2026 Iran War Energy Shock
February 2026 Iran war catalyzed energy price surge. WTI from $73 (January 2026) to $95.85 (April 2026, +30%). XLE rallied substantially.
XLK has not been hurt by Iran war. AI capex narrative immune to Middle East geopolitical. Hyperscaler capex announcements continued. NVDA, MSFT, META, GOOGL all stable to positive.
The configuration: both XLE and XLK rallying. XLE on inflation/oil shock; XLK on AI capex. Configuration is unusual historically.
Possible resolutions. Iran ceasefire stabilization: WTI compresses to $80-85. XLE compresses. XLK could rally further on lower-inflation + Fed cuts. AI capex disappointment: XLK compresses; XLE continues if oil sustained. Both sustain: continued dual rally.
The practical implication: April 2026 setup reflects dual catalysts. Watch which dominates over coming quarters.
How the Pair Performs Through Cycles
2007-2008 commodity supercycle: WTI $147 peak. XLE +50% peak. XLK -25%. XLE/XLK +100%.
2009-2014 disinflation: XLE -20%; XLK +200%. XLE/XLK ratio -75%.
2014-2016 oil collapse: XLE -45%; XLK +30%. XLE/XLK -60%.
2017-2019: XLE -10%; XLK +60%. XLE/XLK -45%.
2020 COVID flash crash: XLE -60%; XLK -28%. Both fell.
2021-2022 inflation surge: XLE +200% (best sector); XLK -28%. XLE/XLK ratio +320% peak-to-peak. Most extreme historical inflection.
2023-2024 AI bull: XLE +5%; XLK +75%. XLE/XLK -40%.
2025-2026: XLE moderate; XLK strong. XLE/XLK -20% before Iran war.
2026 Iran war: XLE +20-25%; XLK stable. XLE/XLK +20-25%.
Pattern: XLE/XLK swings dramatically through cycles. 2021-2022 inflation surge produced 320% ratio swing.
How the Pair Performs in Stress
2008-09 GFC: XLE -50%; XLK -54%. Both fell. XLE/XLK relatively stable.
2018 Q4: XLE -25%; XLK -22%. Both fell.
2020 COVID: XLE -60%; XLK -28%. XLE substantial underperformance.
2022 hiking + Russia: XLE +60% in 2022; XLK -36%. Most extreme inflection.
2023 SVB: XLE -3%; XLK +5%. XLK benefits.
2024-2025: XLK dominant.
2026 Iran war: XLE +25%; XLK stable. XLE relative outperformance from oil shock.
Pattern: XLE/XLK reflects inflation regime. Inflation surges produce XLE outperformance. Disinflation/AI produces XLK outperformance.
Volatility and Trading
XLE realized volatility ~25-35%. XLK ~18-25%. XLE/XLK ratio realized vol ~30-40%.
60-day correlation 0.30-0.50 (modestly positive market beta shared).
XLE exposure: XLE ETF or VDE. XLK exposure: XLK ETF or VGT (broader tech). Direct: XOM/CVX vs MSFT/NVDA.
2022 long XLE / short XLK gained substantially (+80%). 2023-2024 long XLK / short XLE gained substantially. 2026 Iran war long XLE gained substantially.
Most actionable: oil price direction; AI capex sustainability.
Reading the Pair as a Trading Tool
XLE rising + XLK rising (current April 2026): dual catalysts (oil + AI). Allocate to both.
XLE rising + XLK falling: inflation regime (2022 prototype). Long XLE / short XLK.
XLE falling + XLK rising: disinflation/AI regime (2009-2014, 2023-2024). Long XLK / short XLE.
XLE falling + XLK falling: recession. Defensive.
April 2026 setup: dual catalysts. Watch for inflection.
Key watches: WTI direction (Iran ceasefire); hyperscaler capex (Q1 2026 earnings); Fed policy.
How XLE-vs-XLK Compares to Other Sector Pairs
XLE/XLK captures inflation regime. Compared.
Vs XLF/XLK: XLF positive rate sensitivity, XLK negative. Different driver (rates).
Vs XLU/XLK: XLU bond proxy + AI data center, XLK pure AI capex.
Vs XLE/XLF: both cyclical. Different driver (commodity vs banking).
April 2026 reading: XLE +20-25% YTD vs XLK stable. Iran war oil shock dominant. Longer-term AI capex still supportive of XLK.
Forward View: Watch Iran Ceasefire and AI Capex
XLE near 52-week highs. XLK $155.03. WTI $95.85 (Iran war). AI capex $400B+ run-rate.
Forward: Iran ceasefire could compress oil to $80-85, weakening XLE. AI capex sustainability supports XLK. Fed cuts (if resumed) benefit XLK more than XLE.
Key watches: Iran developments; hyperscaler capex (Q1 2026 April-May); 10Y trajectory; oil prices.
Risks: AI disappointment compresses XLK; oil collapse compresses XLE; recession affects both.
Conditional Forward Response (Tail Events)
How Technology (XLK) has historically behaved in the 5 sessions following a top-decile or bottom-decile daily move in Energy (XLE). Computed from 1,266 aligned daily observations ending .
Following these triggers, Technology (XLK) falls 0.06% on average over the next 5 sessions, versus an unconditional baseline of +0.43%. 126 qualifying events; Technology (XLK) closed positive in 52% of them.
Following these triggers, Technology (XLK) rises 1.48% on average over the next 5 sessions, versus an unconditional baseline of +0.43%. 127 qualifying events; Technology (XLK) closed positive in 69% of them.
Past behavior in the tails is descriptive, not predictive. Mean response is the simple arithmetic mean of compounded 5-day forward returns following each trigger event; baseline is the unconditional mean across the full sample window. Edge measures the gap between the two.
90-Day Statistics
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Frequently Asked Questions
What are XLE and XLK?+
XLE (Energy Select Sector SPDR) tracks energy sector with top weights ExxonMobil ~22%, Chevron ~15%, ConocoPhillips ~7%. XLK (Technology Select Sector SPDR) tracks tech with top weights AAPL ~17%, MSFT ~14%, NVDA ~10%, AVGO ~6%, ORCL ~4% (top 5 ~50%). April 2026: WTI $95.85 (Iran war oil shock, +30% from January 2026). XLE near 52-week highs (estimated +20-25% YTD). XLK $155.03 (April 21 2026 near recent highs). XLE/XLK ratio ~0.55 (12-month range 0.50-0.65). Long-term range varies: 2008 commodity peak >2.0; 2020-2021 zero-rate AI bull <0.30; 2022 Russia + tech bear >0.85; 2024 AI bull <0.45; 2026 Iran war ~0.55.
How do XLE and XLK embody old-vs-new economy?+
XLE composition: integrated majors (XOM, CVX) ~37%; E&P (COP, EOG, OXY, PXD) ~25%; oil service ~10%; refiners ~12%; midstream ~8%; integrated gas + renewables ~8%. Cyclical, capital-intensive, dividend-paying mature industries. XLK composition: AAPL ~17%, MSFT ~14%, NVDA ~10%, AVGO ~6%, ORCL ~4%. Growth-oriented, capital-light (relative), R&D-driven, low-dividend (XLK ~0.7% vs XLE ~2.5%). XLE/XLK rotation reflects macro regime. Inflation regime = XLE outperforms (commodity hedge + cyclical earnings). Disinflation/AI regime = XLK outperforms (multiple expansion + growth scarcity + AI capex). 2024-2026 era saw both rally simultaneously due to dual narratives.
How do XLE and XLK diverge?+
Inflation regime: XLE outperforms substantially. 2021-2022: XLE +50%; XLK -28%. XLE/XLK ratio +90% peak-to-peak. Disinflation regime: XLK outperforms. 2009-2014: XLE -20%; XLK +200%. XLE/XLK ratio -73% peak-to-peak. AI capex regime: XLK outperforms through earnings revisions despite higher rates. 2023-2024: XLK +75%; XLE +5%. XLE/XLK -40%. Commodity supercycle + AI: rare. April 2026 setup with both rallying. Iran war + AI capex coexisting. Long-run correlation 0.30-0.50 (modest positive). Share market beta but diverge on macro regime.
How does the 2026 Iran war shock affect the pair?+
February 2026 Iran war catalyzed energy price surge. WTI $73 (January 2026) to $95.85 (April 2026, +30%). XLE rallied substantially. XLK not hurt by Iran war. AI capex narrative immune to Middle East geopolitical. Hyperscaler capex continued. NVDA, MSFT, META, GOOGL stable to positive. Configuration: both XLE and XLK rallying. XLE on inflation/oil shock; XLK on AI capex. Possible resolutions: Iran ceasefire stabilization compresses WTI to $80-85, XLE compresses, XLK could rally further on lower inflation + Fed cuts. AI capex disappointment compresses XLK; XLE continues if oil sustained. Both sustain: continued dual rally.
How does the pair perform through cycles?+
2007-2008 commodity supercycle: XLE +50%; XLK -25%. XLE/XLK +100%. 2009-2014 disinflation: XLE -20%; XLK +200%. XLE/XLK -75%. 2014-2016 oil collapse: XLE -45%; XLK +30%. XLE/XLK -60%. 2017-2019: XLE -10%; XLK +60%. XLE/XLK -45%. 2020 COVID: XLE -60%; XLK -28%. Both fell. 2021-2022 inflation surge: XLE +200% (best sector); XLK -28%. XLE/XLK +320% peak-to-peak (most extreme historical inflection). 2023-2024 AI bull: XLE +5%; XLK +75%. XLE/XLK -40%. 2025-2026: XLK strong. 2026 Iran war: XLE +20-25%; XLK stable.
How does the pair perform in stress?+
2008-09 GFC: XLE -50%; XLK -54%. Both fell. 2018 Q4: XLE -25%; XLK -22%. Both fell. 2020 COVID: XLE -60%; XLK -28%. XLE substantial underperformance. 2022 hiking + Russia: XLE +60% in 2022; XLK -36%. Most extreme inflection. 2023 SVB: XLE -3%; XLK +5%. 2024-2025: XLK dominant. 2026 Iran war: XLE +25%; XLK stable. XLE relative outperformance from oil shock. Pattern: XLE/XLK reflects inflation regime. Inflation surges produce XLE outperformance. Disinflation/AI produces XLK.
How is the pair traded?+
XLE realized volatility ~25-35%. XLK ~18-25%. XLE/XLK ratio realized vol ~30-40%. 60-day correlation 0.30-0.50 (modestly positive market beta shared). XLE exposure: XLE ETF or VDE. XLK exposure: XLK ETF or VGT (broader tech). Direct: XOM/CVX vs MSFT/NVDA. 2022 long XLE / short XLK gained substantially (+80%). 2023-2024 long XLK / short XLE gained substantially. 2026 Iran war long XLE gained substantially. Most actionable: oil price direction; AI capex sustainability.
How is the pair used for trading?+
XLE rising + XLK rising (current April 2026): dual catalysts (oil + AI). Allocate to both. XLE rising + XLK falling: inflation regime (2022 prototype). Long XLE / short XLK. XLE falling + XLK rising: disinflation/AI regime (2009-2014, 2023-2024). Long XLK / short XLE. XLE falling + XLK falling: recession. Defensive. April 2026: dual catalysts. Watch for inflection. Watch WTI direction (Iran ceasefire); hyperscaler capex (Q1 2026 earnings); Fed policy.
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