ADTN vs. DLR

Last updated Jun 4, 2026

ADTN (ADTRAN, Inc.) and DLR (Digital Realty Trust, Inc.) are both stocks. ADTN operates in Communication Equipment (Technology), while DLR operates in REIT - Office (Real Estate). Over the past 10 years, ADTN returned 0.79%/yr vs 10.16%/yr for DLR. At a 0.28 correlation, their price movements are largely independent.

Performance

ADTN vs. DLR - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in ADTRAN, Inc. (ADTN) and Digital Realty Trust, Inc. (DLR). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ADTN achieves a 102.07% return, which is significantly higher than DLR's 19.42% return. Over the past 10 years, ADTN has underperformed DLR with an annualized return of 0.79%, while DLR has yielded a comparatively higher 10.16% annualized return.

ADTN

• 1D: -3.83%
• 1M: -4.25%
• YTD: 102.07%
• 6M: 113.37%
• 1Y: 111.57%
• 3Y*: 25.56%
• 5Y*: -2.05%
• 10Y*: 0.79%

DLR

• 1D: -2.01%
• 1M: -7.56%
• YTD: 19.42%
• 6M: 16.62%
• 1Y: 8.70%
• 3Y*: 24.34%
• 5Y*: 7.01%
• 10Y*: 10.16%

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

ADTN vs. DLR - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ADTN ADTRAN, Inc.	102.07%	4.32%	13.49%	-59.88%	-16.28%	57.43%	54.41%	-5.22%	-43.14%	-11.96%
DLR Digital Realty Trust, Inc.	19.42%	-10.07%	35.90%	39.95%	-41.00%	30.66%	20.37%	16.52%	-3.00%	19.80%

Correlation

The correlation between ADTN and DLR is 0.29, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.29
Correlation (3Y) Calculated over the trailing 3-year period	0.27
Correlation (5Y) Calculated over the trailing 5-year period	0.29
Correlation (10Y) Calculated over the trailing 10-year period	0.22
Correlation (All Time) Calculated using the full available price history since Nov 1, 2004	0.28

Fundamentals

EPS ADTN : -$0.37 DLR : $4.53
PS Ratio ADTN : 1.25 DLR : 9.44
Total Revenue (TTM) ADTN : $1.12B DLR : $5.09B
Gross Profit (TTM) ADTN : $432.77M DLR : $1.67B
EBITDA (TTM) ADTN : $56.05M DLR : $3.18B

Return for Risk

ADTN vs. DLR — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

ADTN

ADTN Risk / Return Rank: 82
ADTN Sharpe Ratio Rank: 84
ADTN Sortino Ratio Rank: 76
ADTN Omega Ratio Rank: 81
ADTN Calmar Ratio Rank: 85
ADTN Martin Ratio Rank: 85

DLR

DLR Risk / Return Rank: 50
DLR Sharpe Ratio Rank: 54
DLR Sortino Ratio Rank: 47
DLR Omega Ratio Rank: 45
DLR Calmar Ratio Rank: 52
DLR Martin Ratio Rank: 54

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

ADTN vs. DLR - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for ADTRAN, Inc. (ADTN) and Digital Realty Trust, Inc. (DLR). 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.

	ADTN	DLR	Difference
Sharpe ratio Return per unit of total volatility	1.74	0.39	+1.35
Sortino ratio Return per unit of downside risk	2.08	0.72	+1.36
Omega ratio Gain probability vs. loss probability	1.32	1.08	+0.24
Calmar ratio Return relative to maximum drawdown	3.54	0.52	+3.02
Martin ratio Return relative to average drawdown	8.94	1.32	+7.62
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ADTN vs. DLR - Sharpe Ratio Comparison

The current ADTN Sharpe Ratio is 1.74, which is higher than the DLR Sharpe Ratio of 0.39. The chart below compares the historical Sharpe Ratios of ADTN and DLR, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	ADTN	DLR	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.74	0.39	+1.35
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.04	0.25	-0.28
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.02	0.36	-0.35
Sharpe Ratio (All Time) Calculated using the full available price history	0.10	0.56	-0.46

Drawdowns

ADTN vs. DLR - Drawdown Comparison

The maximum ADTN drawdown since its inception was -87.92%, which is greater than DLR's maximum drawdown of -56.80%. Use the drawdown chart below to compare losses from any high point for ADTN and DLR.

Drawdown Indicators

	ADTN	DLR	Difference
Max Drawdown Largest peak-to-trough decline	-87.92%	-56.80%	-31.12%
Max Drawdown (1Y) Largest decline over 1 year	-31.67%	-16.83%	-14.84%
Max Drawdown (3Y) Largest decline over 3 years	-59.48%	-29.40%	-30.08%
Max Drawdown (5Y) Largest decline over 5 years	-81.99%	-48.52%	-33.47%
Max Drawdown (10Y) Largest decline over 10 years	-81.99%	-48.52%	-33.47%
Current Drawdown Current decline from peak	-51.57%	-10.01%	-41.56%
Average Drawdown Average peak-to-trough decline	-47.91%	-11.14%	-36.77%
Ulcer Index Depth and duration of drawdowns from previous peaks	12.53%	6.63%	+5.90%

Volatility

ADTN vs. DLR - Volatility Comparison

ADTRAN, Inc. (ADTN) has a higher volatility of 33.74% compared to Digital Realty Trust, Inc. (DLR) at 6.47%. This indicates that ADTN's price experiences larger fluctuations and is considered to be riskier than DLR based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ADTN	DLR	Difference
Volatility (1M) Calculated over the trailing 1-month period	33.74%	6.47%	+27.27%
Volatility (6M) Calculated over the trailing 6-month period	44.93%	15.99%	+28.94%
Volatility (1Y) Calculated over the trailing 1-year period	64.52%	22.30%	+42.22%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	54.94%	28.54%	+26.40%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	50.21%	28.17%	+22.04%

Dividends

ADTN vs. DLR - Dividend Comparison

ADTN has not paid dividends to shareholders, while DLR's dividend yield for the trailing twelve months is around 2.66%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ADTN ADTRAN, Inc.	0.00%	0.00%	0.00%	3.68%	1.92%	1.58%	2.44%	3.64%	3.35%	1.86%	1.61%	2.09%
DLR Digital Realty Trust, Inc.	2.66%	3.15%	2.75%	3.63%	4.87%	2.62%	3.21%	3.61%	3.79%	3.27%	3.58%	4.50%

Financials

ADTN vs. DLR - Profitability Comparison

The chart below illustrates the profitability comparison between ADTRAN, Inc. and Digital Realty Trust, Inc. over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

ADTN - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, ADTRAN, Inc. reported a gross profit of 112.99M and revenue of 286.09M. Therefore, the gross margin over that period was 39.5%.

DLR - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Digital Realty Trust, Inc. reported a gross profit of 0.00 and revenue of 303.36M. Therefore, the gross margin over that period was 0.0%.

ADTN - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, ADTRAN, Inc. reported an operating income of 6.38M and revenue of 286.09M, resulting in an operating margin of 2.2%.

DLR - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Digital Realty Trust, Inc. reported an operating income of 195.64M and revenue of 303.36M, resulting in an operating margin of 64.5%.

ADTN - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, ADTRAN, Inc. reported a net income of 4.76M and revenue of 286.09M, resulting in a net margin of 1.7%.

DLR - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Digital Realty Trust, Inc. reported a net income of -12.46M and revenue of 303.36M, resulting in a net margin of -4.1%.

Frequently Asked Questions

Can I hold both ADTN and DLR in my portfolio?

ADTN and DLR have a correlation of 0.29, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ADTN or DLR?

ADTN has higher volatility (33.74%) compared to DLR (6.47%). In terms of maximum drawdown, ADTN dropped -87.92% vs DLR's -56.80%.

Which has better risk-adjusted returns?

ADTN currently has the higher Sharpe Ratio (1.74 vs 0.39), 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.