🔬 Sector X-Ray
See your true sector exposure. Are you 40% tech? 60%? Find out before the next crash.
The 11 S&P 500 Market Sectors
The Global Industry Classification Standard (GICS) divides the S&P 500 into 11 sectors. Every company in every ETF belongs to one of these sectors. Understanding sector weights is critical because most popular ETFs are far more concentrated than investors realize.
Apple, Microsoft, NVIDIA, Broadcom, Salesforce. The largest sector in the S&P 500 by a wide margin.
JPMorgan, Berkshire Hathaway, Bank of America, Wells Fargo, Visa. Interest-rate sensitive.
UnitedHealth, Johnson & Johnson, Eli Lilly, AbbVie. Defensive sector — holds up in recessions.
Amazon, Tesla, Home Depot, McDonald's. Cyclical — suffers most in downturns.
Alphabet, Meta, Netflix, Disney. Blends tech characteristics with media/advertising.
Caterpillar, United Parcel Service, Boeing, Honeywell. Tracks economic cycle closely.
Walmart, Procter & Gamble, Coca-Cola, Costco. Most defensive sector — people always buy essentials.
ExxonMobil, Chevron, ConocoPhillips. Highly correlated with oil prices.
NextEra Energy, Duke Energy. Bond-like behavior — falls when rates rise, rises when rates fall.
American Tower, Prologis, Crown Castle. Sensitive to interest rates; provides income and inflation hedge.
Linde, Air Products, Sherwin-Williams, Freeport-McMoRan. Tied to global industrial activity.
Why Sector Concentration Is the Hidden Risk in Most ETF Portfolios
The most common mistake ETF investors make is unknowingly building extreme sector concentration. Consider a typical "diversified" portfolio: SPY (S&P 500) + QQQ (Nasdaq-100) + VGT (Technology). Each fund looks distinct, but the combined technology exposure is approximately 59% of the portfolio — an enormous single-sector bet.
This matters because sector performance varies dramatically year to year. Technology lost 33% in 2022. Energy gained 65%. Healthcare gained 14%. A portfolio concentrated in a single sector experiences the full brunt of that sector's downturn with no buffer from uncorrelated positions.
A well-diversified portfolio generally keeps any single sector below 30% and maintains representation across at least 6–7 of the 11 GICS sectors, including a mix of cyclical sectors (tech, consumer discretionary) and defensive sectors (healthcare, staples, utilities).
Sector ETFs vs. Broad Market ETFs
Sector ETFs (like XLK, XLV, XLE) give targeted exposure to a single GICS sector. They are useful for overweighting sectors you believe will outperform, or for underweighting sectors you want to avoid. However, they come with higher volatility and require active conviction.
Broad market ETFs (like VTI, SPY, VXUS) automatically spread exposure across all sectors at market-cap weights. They are the foundation of most passive portfolios. The Sector X-Ray tool above shows exactly how those market-cap weights translate into sector concentration for any combination of ETFs you hold.
If your analysis shows technology above 40%, consider balancing with a defensive sector ETF (XLV for healthcare, XLP for consumer staples) or with international ETFs that underweight US tech (EFA, VWO).
Frequently Asked Questions About ETF Sector Exposure
What sector weight is healthy for a long-term portfolio?
Most financial advisors suggest keeping any single sector below 25–30% of total equity exposure. The S&P 500 itself currently allocates about 32% to technology, which already concentrates many passive investors more than they realize. Adding tech-focused ETFs on top of SPY or VOO quickly pushes that concentration to dangerous levels.
Which sectors perform best in a recession?
Defensive sectors historically outperform during economic downturns: Consumer Staples (XLP), Healthcare (XLV), and Utilities (XLU). These sectors sell products and services people need regardless of economic conditions. By contrast, Consumer Discretionary (XLY) and Industrials (XLI) typically suffer the most in recessions as spending on non-essentials falls.
How do I reduce technology overweight in my portfolio?
The most direct approach is to add sector ETFs that are underrepresented in your portfolio — XLV (healthcare), XLP (consumer staples), XLE (energy), or XLU (utilities). Alternatively, adding international ETFs (EFA, VWO) reduces US tech concentration because non-US markets have much lower technology weights. The Sector X-Ray tool above shows you exactly how any new ETF addition shifts your sector breakdown before you commit.