STK vs. AAIZX

Last updated Apr 2, 2026

Compare and contrast key facts about Columbia Seligman Premium Technology Growth Closed Fund (STK) and Alger AI Enablers & Adopters Z (AAIZX).

STK is an actively managed fund by Aberdeen. It was launched on Nov 25, 2009. AAIZX is an actively managed fund by Alger. It was launched on Apr 4, 2024.

Performance

STK vs. AAIZX - Performance Comparison

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

STK vs. AAIZX - Yearly Performance Comparison

	2026 (YTD)	2025	2024
STK Columbia Seligman Premium Technology Growth Closed Fund	7.23%	24.85%	15.09%
AAIZX Alger AI Enablers & Adopters Z	-7.82%	41.00%	33.76%

Returns By Period

In the year-to-date period, STK achieves a 7.23% return, which is significantly higher than AAIZX's -7.82% return.

STK

• 1D: 2.79%
• 1M: -3.99%
• YTD: 7.23%
• 6M: 13.94%
• 1Y: 50.57%
• 3Y*: 23.77%
• 5Y*: 15.10%
• 10Y*: 19.36%

AAIZX

• 1D: 4.88%
• 1M: -2.33%
• YTD: -7.82%
• 6M: -10.37%
• 1Y: 46.01%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

STK vs. AAIZX - Expense Ratio Comparison

STK has a 1.26% expense ratio, which is higher than AAIZX's 0.55% expense ratio.

STK

Columbia Seligman Premium Technology Growth Closed Fund

AAIZX

Alger AI Enablers & Adopters Z

Return for Risk

STK vs. AAIZX — Risk / Return Rank

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

STK

STK Risk / Return Rank: 92
STK Sharpe Ratio Rank: 91
STK Sortino Ratio Rank: 91
STK Omega Ratio Rank: 87
STK Calmar Ratio Rank: 96
STK Martin Ratio Rank: 95

AAIZX

AAIZX Risk / Return Rank: 83
AAIZX Sharpe Ratio Rank: 84
AAIZX Sortino Ratio Rank: 84
AAIZX Omega Ratio Rank: 78
AAIZX Calmar Ratio Rank: 90
AAIZX Martin Ratio Rank: 77

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.

STK vs. AAIZX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Columbia Seligman Premium Technology Growth Closed Fund (STK) and Alger AI Enablers & Adopters Z (AAIZX). 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.

	STK	AAIZX	Difference
Sharpe ratio Return per unit of total volatility	1.97	1.68	+0.29
Sortino ratio Return per unit of downside risk	2.70	2.33	+0.37
Omega ratio Gain probability vs. loss probability	1.38	1.31	+0.06
Calmar ratio Return relative to maximum drawdown	3.73	2.71	+1.03
Martin ratio Return relative to average drawdown	13.76	8.16	+5.60
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

STK vs. AAIZX - Sharpe Ratio Comparison

The current STK Sharpe Ratio is 1.97, which is comparable to the AAIZX Sharpe Ratio of 1.68. The chart below compares the historical Sharpe Ratios of STK and AAIZX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	STK	AAIZX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.97	1.68	+0.29
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.61	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.75	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.65	1.17	-0.52

Correlation

The correlation between STK and AAIZX is 0.75, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

STK vs. AAIZX - Dividend Comparison

STK's dividend yield for the trailing twelve months is around 6.96%, more than AAIZX's 6.85% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
STK Columbia Seligman Premium Technology Growth Closed Fund	6.96%	7.38%	16.02%	6.70%	12.62%	8.48%	6.79%	7.86%	14.88%	11.82%	9.87%	10.32%
AAIZX Alger AI Enablers & Adopters Z	6.85%	6.31%	4.44%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Drawdowns

STK vs. AAIZX - Drawdown Comparison

The maximum STK drawdown since its inception was -41.74%, which is greater than AAIZX's maximum drawdown of -29.00%. Use the drawdown chart below to compare losses from any high point for STK and AAIZX.

Drawdown Indicators

	STK	AAIZX	Difference
Max Drawdown Largest peak-to-trough decline	-41.74%	-29.00%	-12.74%
Max Drawdown (1Y) Largest decline over 1 year	-13.59%	-17.47%	+3.88%
Max Drawdown (5Y) Largest decline over 5 years	-36.27%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-41.74%	—	—
Current Drawdown Current decline from peak	-4.93%	-13.44%	+8.51%
Average Drawdown Average peak-to-trough decline	-7.47%	-5.25%	-2.22%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.69%	5.79%	-2.10%

Volatility

STK vs. AAIZX - Volatility Comparison

Columbia Seligman Premium Technology Growth Closed Fund (STK) has a higher volatility of 10.03% compared to Alger AI Enablers & Adopters Z (AAIZX) at 9.48%. This indicates that STK's price experiences larger fluctuations and is considered to be riskier than AAIZX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	STK	AAIZX	Difference
Volatility (1M) Calculated over the trailing 1-month period	10.03%	9.48%	+0.55%
Volatility (6M) Calculated over the trailing 6-month period	18.08%	17.87%	+0.21%
Volatility (1Y) Calculated over the trailing 1-year period	25.75%	28.91%	-3.16%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	24.85%	27.99%	-3.14%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	25.92%	27.99%	-2.07%