TDG vs. XLK

Last updated Aug 5, 2026

TDG (TransDigm Group Incorporated) is a stock, while XLK (State Street Technology Select Sector SPDR ETF) is Technology Equities fund tracking the S&P Technology Select Sector Daily Capped 35/20 Index. Over the past 10 years, TDG returned 21.94%/yr vs 24.33%/yr for XLK. Their 0.47 correlation means their historical movements had little consistent relationship.

Performance

TDG vs. XLK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in TransDigm Group Incorporated (TDG) and State Street Technology Select Sector SPDR ETF (XLK). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, TDG achieves a -4.12% return, which is significantly lower than XLK's 30.13% return. Over the past 10 years, TDG has underperformed XLK with an annualized return of 21.94%, while XLK has yielded a comparatively higher 24.33% annualized return.

TDG

• 1D: -0.82%
• 1M: -5.45%
• 6M: -2.06%
• YTD: -4.12%
• 1Y: -15.31%
• 3Y*: 18.51%
• 5Y*: 19.69%
• 10Y*: 21.94%
• ALL TIME*: 27.71%

XLK

• 1D: 4.98%
• 1M: 3.49%
• 6M: 31.87%
• YTD: 30.13%
• 1Y: 43.26%
• 3Y*: 30.60%
• 5Y*: 20.15%
• 10Y*: 24.33%
• ALL TIME*: 10.46%

*Multi-year figures are annualized to reflect compound growth (CAGR)

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
TDG TransDigm Group Incorporated	$530.15M	$463.56M	$492.87M
XLK State Street Technology Select Sector SPDR ETF	$1.76B	$1.67B	$2.24B

TDG vs. XLK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TDG TransDigm Group Incorporated	-4.12%	12.15%	32.27%	66.57%	1.77%	2.82%	10.51%	84.41%	23.83%	19.84%
XLK State Street Technology Select Sector SPDR ETF	30.13%	24.61%	21.63%	56.02%	-27.73%	34.74%	43.62%	49.86%	-1.68%	34.26%

Correlation

The correlation between TDG and XLK is 0.11, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.11
Correlation (3Y) Balances recent behavior with more history.	0.30
Correlation (5Y) Shows whether the relationship held over a longer period.	0.44
Correlation (10Y) Provides a long-term view across more market conditions.	0.44
Correlation (All Time) Calculated using the full available price history since Mar 15, 2006	0.47

Over the past year, the correlation between TDG and XLK has dropped to 0.11 - well below their long-term average of 0.47, suggesting their price drivers have been diverging.

Return for Risk

TDG vs. XLK — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

TDG

TDG Risk / Return Rank: 16
TDG Sharpe Ratio Rank: 19
TDG Sortino Ratio Rank: 19
TDG Omega Ratio Rank: 19
TDG Calmar Ratio Rank: 16
TDG Martin Ratio Rank: 6

XLK

XLK Risk / Return Rank: 61
XLK Sharpe Ratio Rank: 64
XLK Sortino Ratio Rank: 58
XLK Omega Ratio Rank: 58
XLK Calmar Ratio Rank: 70
XLK Martin Ratio Rank: 56

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

TDG vs. XLK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for TransDigm Group Incorporated (TDG) and State Street Technology Select Sector SPDR ETF (XLK). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	TDG	XLK	Difference
Sharpe ratio: Return per unit of total volatility	-0.52	1.68	-2.20
Sortino ratio: Return per unit of downside risk	-0.52	2.25	-2.77
Omega ratio: Gain probability vs. loss probability	0.93	1.28	-0.35
Calmar ratio: Return relative to maximum drawdown	-0.70	2.73	-3.43
Martin ratio: Return relative to average drawdown	-1.44	7.35	-8.79

TDG vs. XLK - Sharpe Ratio Comparison

The current TDG Sharpe Ratio is -0.52, which is lower than the XLK Sharpe Ratio of 1.68. The chart below compares the historical Sharpe Ratios of TDG and XLK, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

TDG vs. XLK - Drawdown Comparison

The maximum TDG drawdown since its inception was -62.64%, smaller than the maximum XLK drawdown of -82.05%. Use the drawdown chart below to compare losses from any high point for TDG and XLK.

Drawdown Indicators

	TDG	XLK	Difference
Max Drawdown Largest peak-to-trough decline	-62.64%	-82.05%	+19.41%
Max Drawdown (1Y) Largest decline over 1 year	-21.87%	-15.92%	-5.95%
Max Drawdown (3Y) Largest decline over 3 years	-25.30%	-25.66%	+0.36%
Max Drawdown (5Y) Largest decline over 5 years	-25.30%	-33.56%	+8.26%
Max Drawdown (10Y) Largest decline over 10 years	-62.64%	-33.56%	-29.08%
Current Drawdown Current decline from peak	-15.92%	-5.59%	-10.33%
Average Drawdown Average peak-to-trough decline	-8.01%	-34.79%	+26.78%
Ulcer Index Depth and duration of drawdowns from previous peaks	15.30%	5.90%	+9.40%

Volatility

TDG vs. XLK - Volatility Comparison

The current volatility for TransDigm Group Incorporated (TDG) is 9.06%, while State Street Technology Select Sector SPDR ETF (XLK) has a volatility of 10.47%. This indicates that TDG experiences smaller price fluctuations and is considered to be less risky than XLK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TDG	XLK	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.06%	10.47%	-1.41%
Volatility (6M) Calculated over the trailing 6-month period	23.39%	22.23%	+1.16%
Volatility (1Y) Calculated over the trailing 1-year period	29.65%	25.96%	+3.69%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	28.02%	25.86%	+2.16%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	33.95%	24.96%	+8.99%

Dividends

TDG vs. XLK - Dividend Comparison

TDG's dividend yield for the trailing twelve months is around 7.06%, more than XLK's 0.42% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
TDG TransDigm Group Incorporated	7.06%	6.77%	5.92%	3.46%	2.94%	0.00%	0.00%	11.16%	0.00%	8.01%	9.64%	0.00%
XLK State Street Technology Select Sector SPDR ETF	0.42%	0.54%	0.66%	0.76%	1.04%	0.65%	0.92%	1.16%	1.60%	1.37%	1.74%	1.79%

Frequently Asked Questions

Can I hold both TDG and XLK in my portfolio?

TDG and XLK have a correlation of 0.11, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, TDG or XLK?

XLK has higher volatility (10.47%) compared to TDG (9.06%). In terms of maximum drawdown, TDG dropped -62.64% vs XLK's -82.05%.

Which has better risk-adjusted returns?

XLK currently has the higher Sharpe Ratio (1.68 vs -0.52), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.