CCOI vs. TAN

Last updated Jun 25, 2026

CCOI (Cogent Communications Holdings, Inc.) is a stock, while TAN (Invesco Solar ETF) is Alternative Energy Equities fund tracking the MAC Global Solar Energy Index. Over the past 10 years, CCOI returned -5.50%/yr vs 12.27%/yr for TAN. At a 0.35 correlation, their price movements are largely independent.

Performance

CCOI vs. TAN - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Cogent Communications Holdings, Inc. (CCOI) and Invesco Solar ETF (TAN). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CCOI achieves a -37.16% return, which is significantly lower than TAN's 18.40% return. Over the past 10 years, CCOI has underperformed TAN with an annualized return of -5.50%, while TAN has yielded a comparatively higher 12.27% annualized return.

CCOI

• 1D: -4.52%
• 1M: -25.55%
• YTD: -37.16%
• 6M: -39.11%
• 1Y: -71.59%
• 3Y*: -37.50%
• 5Y*: -25.75%
• 10Y*: -5.50%

TAN

• 1D: -0.68%
• 1M: -11.81%
• YTD: 18.40%
• 6M: 14.35%
• 1Y: 74.08%
• 3Y*: -4.91%
• 5Y*: -7.32%
• 10Y*: 12.27%

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

CCOI vs. TAN - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
CCOI Cogent Communications Holdings, Inc.	-37.16%	-70.14%	7.19%	41.23%	-17.20%	27.78%	-5.33%	51.98%	4.25%	14.33%
TAN Invesco Solar ETF	18.40%	48.31%	-37.61%	-26.79%	-5.24%	-25.10%	233.96%	66.53%	-25.67%	54.38%

Correlation

The correlation between CCOI and TAN 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	0.26
Correlation (5Y) Calculated over the trailing 5-year period	0.30
Correlation (10Y) Calculated over the trailing 10-year period	0.29
Correlation (All Time) Calculated using the full available price history since Apr 15, 2008	0.35

Return for Risk

CCOI vs. TAN — Risk / Return Rank

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

CCOI

CCOI Risk / Return Rank: 8
CCOI Sharpe Ratio Rank: 9
CCOI Sortino Ratio Rank: 10
CCOI Omega Ratio Rank: 8
CCOI Calmar Ratio Rank: 3
CCOI Martin Ratio Rank: 8

TAN

TAN Risk / Return Rank: 65
TAN Sharpe Ratio Rank: 67
TAN Sortino Ratio Rank: 63
TAN Omega Ratio Rank: 54
TAN Calmar Ratio Rank: 76
TAN Martin Ratio Rank: 67

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.

CCOI vs. TAN - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Cogent Communications Holdings, Inc. (CCOI) and Invesco Solar ETF (TAN). 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.

	CCOI	TAN	Difference
Sharpe ratio: Return per unit of total volatility	-0.82	1.94	-2.77
Sortino ratio: Return per unit of downside risk	-1.14	2.60	-3.75
Omega ratio: Gain probability vs. loss probability	0.83	1.31	-0.48
Calmar ratio: Return relative to maximum drawdown	-0.97	3.49	-4.46
Martin ratio: Return relative to average drawdown	-1.45	10.97	-12.42

CCOI vs. TAN - Sharpe Ratio Comparison

The current CCOI Sharpe Ratio is -0.82, which is lower than the TAN Sharpe Ratio of 1.94. The chart below compares the historical Sharpe Ratios of CCOI and TAN, 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

CCOI vs. TAN - Drawdown Comparison

The maximum CCOI drawdown since its inception was -96.72%, roughly equal to the maximum TAN drawdown of -95.29%. Use the drawdown chart below to compare losses from any high point for CCOI and TAN.

Drawdown Indicators

	CCOI	TAN	Difference
Max Drawdown Largest peak-to-trough decline	-96.72%	-95.29%	-1.43%
Max Drawdown (1Y) Largest decline over 1 year	-73.65%	-21.33%	-52.32%
Max Drawdown (3Y) Largest decline over 3 years	-82.85%	-64.40%	-18.45%
Max Drawdown (5Y) Largest decline over 5 years	-82.85%	-73.95%	-8.90%
Max Drawdown (10Y) Largest decline over 10 years	-82.85%	-78.53%	-4.32%
Current Drawdown Current decline from peak	-82.85%	-73.29%	-9.56%
Average Drawdown Average peak-to-trough decline	-60.43%	-78.47%	+18.04%
Ulcer Index Depth and duration of drawdowns from previous peaks	49.42%	6.77%	+42.65%

Volatility

CCOI vs. TAN - Volatility Comparison

Cogent Communications Holdings, Inc. (CCOI) has a higher volatility of 27.19% compared to Invesco Solar ETF (TAN) at 16.44%. This indicates that CCOI's price experiences larger fluctuations and is considered to be riskier than TAN based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CCOI	TAN	Difference
Volatility (1M) Calculated over the trailing 1-month period	27.19%	16.44%	+10.75%
Volatility (6M) Calculated over the trailing 6-month period	69.45%	28.77%	+40.68%
Volatility (1Y) Calculated over the trailing 1-year period	87.06%	38.51%	+48.55%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	48.20%	40.14%	+8.06%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	41.14%	38.16%	+2.98%

Dividends

CCOI vs. TAN - Dividend Comparison

CCOI's dividend yield for the trailing twelve months is around 7.95%, while TAN has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CCOI Cogent Communications Holdings, Inc.	7.95%	14.15%	5.09%	4.94%	6.23%	4.33%	4.64%	3.71%	4.69%	3.97%	3.65%	4.21%
TAN Invesco Solar ETF	0.00%	0.00%	0.50%	0.09%	0.00%	0.00%	0.09%	0.30%	0.69%	1.77%	5.04%	1.60%

Frequently Asked Questions

Can I hold both CCOI and TAN in my portfolio?

CCOI and TAN 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, CCOI or TAN?

CCOI has higher volatility (27.19%) compared to TAN (16.44%). In terms of maximum drawdown, CCOI dropped -96.72% vs TAN's -95.29%.

Which has better risk-adjusted returns?

TAN currently has the higher Sharpe Ratio (1.94 vs -0.82), 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.