WIREX vs. STK

Last updated Jun 5, 2026

WIREX (Wireless Fund) and STK (Columbia Seligman Premium Technology Growth Closed Fund) are both Technology Equities funds. Over the past 10 years, WIREX returned 21.52%/yr vs 24.43%/yr for STK. A 0.66 correlation means they provide meaningful diversification when combined. WIREX charges 1.95%/yr vs 1.26%/yr for STK.

Performance

WIREX vs. STK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Wireless Fund (WIREX) and Columbia Seligman Premium Technology Growth Closed Fund (STK). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, WIREX achieves a 24.97% return, which is significantly lower than STK's 56.30% return. Over the past 10 years, WIREX has underperformed STK with an annualized return of 21.52%, while STK has yielded a comparatively higher 24.43% annualized return.

WIREX

• 1D: -0.75%
• 1M: 12.06%
• YTD: 24.97%
• 6M: 23.44%
• 1Y: 59.18%
• 3Y*: 36.35%
• 5Y*: 21.34%
• 10Y*: 21.52%

STK

• 1D: -2.19%
• 1M: 12.12%
• YTD: 56.30%
• 6M: 53.02%
• 1Y: 110.29%
• 3Y*: 36.75%
• 5Y*: 21.50%
• 10Y*: 24.43%

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

WIREX vs. STK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
WIREX Wireless Fund	24.97%	26.45%	38.24%	57.70%	-34.76%	23.22%	41.12%	37.03%	-4.60%	29.76%
STK Columbia Seligman Premium Technology Growth Closed Fund	56.30%	24.85%	17.74%	46.60%	-30.36%	48.63%	25.39%	52.73%	-14.91%	33.52%

Correlation

The correlation between WIREX and STK is 0.74, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.74
Correlation (3Y) Calculated over the trailing 3-year period	0.75
Correlation (5Y) Calculated over the trailing 5-year period	0.80
Correlation (10Y) Calculated over the trailing 10-year period	0.73
Correlation (All Time) Calculated using the full available price history since Nov 30, 2009	0.66

The correlation between WIREX and STK shifts across timeframes, from 0.66 (all time) to 0.80 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

WIREX vs. STK — Risk / Return Rank

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

WIREX

WIREX Risk / Return Rank: 76
WIREX Sharpe Ratio Rank: 88
WIREX Sortino Ratio Rank: 73
WIREX Omega Ratio Rank: 71
WIREX Calmar Ratio Rank: 82
WIREX Martin Ratio Rank: 65

STK

STK Risk / Return Rank: 97
STK Sharpe Ratio Rank: 99
STK Sortino Ratio Rank: 97
STK Omega Ratio Rank: 94
STK Calmar Ratio Rank: 98
STK Martin Ratio Rank: 98

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.

WIREX vs. STK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Wireless Fund (WIREX) and Columbia Seligman Premium Technology Growth Closed Fund (STK). 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.

	WIREX	STK	Difference
Sharpe ratio: Return per unit of total volatility	2.87	4.81	-1.94
Sortino ratio: Return per unit of downside risk	3.53	5.58	-2.05
Omega ratio: Gain probability vs. loss probability	1.47	1.75	-0.28
Calmar ratio: Return relative to maximum drawdown	3.74	8.64	-4.90
Martin ratio: Return relative to average drawdown	12.46	36.45	-23.99
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

WIREX vs. STK - Sharpe Ratio Comparison

The current WIREX Sharpe Ratio is 2.87, which is lower than the STK Sharpe Ratio of 4.81. The chart below compares the historical Sharpe Ratios of WIREX and STK, 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

	WIREX	STK	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.87	4.81	-1.94
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.34	0.86	-0.52
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.45	0.94	-0.49
Sharpe Ratio (All Time) Calculated using the full available price history	0.10	0.75	-0.65

Drawdowns

WIREX vs. STK - Drawdown Comparison

The maximum WIREX drawdown since its inception was -92.42%, which is greater than STK's maximum drawdown of -41.74%. Use the drawdown chart below to compare losses from any high point for WIREX and STK.

Drawdown Indicators

	WIREX	STK	Difference
Max Drawdown Largest peak-to-trough decline	-92.42%	-41.74%	-50.68%
Max Drawdown (1Y) Largest decline over 1 year	-16.20%	-12.84%	-3.36%
Max Drawdown (3Y) Largest decline over 3 years	-64.74%	-26.59%	-38.15%
Max Drawdown (5Y) Largest decline over 5 years	-64.74%	-36.27%	-28.47%
Max Drawdown (10Y) Largest decline over 10 years	-64.74%	-41.74%	-23.00%
Current Drawdown Current decline from peak	-27.88%	-2.38%	-25.50%
Average Drawdown Average peak-to-trough decline	-58.37%	-7.40%	-50.97%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.85%	3.04%	+1.81%

Volatility

WIREX vs. STK - Volatility Comparison

The current volatility for Wireless Fund (WIREX) is 6.50%, while Columbia Seligman Premium Technology Growth Closed Fund (STK) has a volatility of 8.74%. This indicates that WIREX experiences smaller price fluctuations and is considered to be less risky than STK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	WIREX	STK	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.50%	8.74%	-2.24%
Volatility (6M) Calculated over the trailing 6-month period	16.50%	19.09%	-2.59%
Volatility (1Y) Calculated over the trailing 1-year period	21.13%	23.07%	-1.94%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	63.56%	25.12%	+38.44%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	47.99%	26.14%	+21.85%

WIREX vs. STK - Expense Ratio Comparison

WIREX has a 1.95% expense ratio, which is higher than STK's 1.26% expense ratio.

Dividends

WIREX vs. STK - Dividend Comparison

WIREX's dividend yield for the trailing twelve months is around 2.72%, less than STK's 4.82% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
STK Columbia Seligman Premium Technology Growth Closed Fund	4.82%	7.38%	16.02%	6.70%	12.62%	8.48%	6.79%	7.86%	14.88%	11.82%	9.87%	10.32%
WIREX Wireless Fund	2.72%	3.41%	1.95%	0.45%	6.80%	16.58%	11.36%	21.52%	5.51%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both WIREX and STK in my portfolio?

WIREX and STK have a correlation of 0.74, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, WIREX or STK?

STK has higher volatility (8.74%) compared to WIREX (6.50%). In terms of maximum drawdown, WIREX dropped -92.42% vs STK's -41.74%.

Which has better risk-adjusted returns?

STK currently has the higher Sharpe Ratio (4.81 vs 2.87), 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.