XLKI vs. TRFM

Last updated Aug 2, 2026

XLKI (State Street Technology Select Sector SPDR Premium Income ETF) and TRFM (AAM Transformers ETF) are both Technology Equities funds. XLKI is actively managed, while TRFM is passively managed. Over the past year, XLKI returned 24.59% vs 34.05% for TRFM. Their correlation of 0.88 means they have usually moved in the same direction. XLKI charges 0.35%/yr vs 0.49%/yr for TRFM.

Performance

XLKI vs. TRFM - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in State Street Technology Select Sector SPDR Premium Income ETF (XLKI) and AAM Transformers ETF (TRFM). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, XLKI achieves a 10.67% return, which is significantly lower than TRFM's 21.27% return.

XLKI

• 1D: 0.01%
• 1M: -1.06%
• 6M: 9.29%
• YTD: 10.67%
• 1Y: 24.59%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 21.71%

TRFM

• 1D: 0.52%
• 1M: -5.31%
• 6M: 17.60%
• YTD: 21.27%
• 1Y: 34.05%
• 3Y*: 23.92%
• 5Y*: —
• 10Y*: —
• ALL TIME*: 23.93%

*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)
TRFM AAM Transformers ETF	$2.71M	$2.26M	$1.99M
XLKI State Street Technology Select Sector SPDR Premium Income ETF	$514.98K	$430.22K	$356.64K

XLKI vs. TRFM - Yearly Performance Comparison

	2026 (YTD)	2025
XLKI State Street Technology Select Sector SPDR Premium Income ETF	10.67%	10.02%
TRFM AAM Transformers ETF	21.27%	7.58%

Correlation

The correlation between XLKI and TRFM is 0.88, meaning they have usually moved in the same direction, including during past declines.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.88
Correlation (All Time) Calculated using the full available price history since Jul 30, 2025	0.88

The correlation between XLKI and TRFM has been stable across timeframes, ranging from 0.88 to 0.88 - a consistent structural relationship.

XLKI vs. TRFM - Sectors Allocation Comparison

Sectors	XLKI	TRFM
Financial Services	99.9%	1.8%
Technology	99.2%	54.7%
Communication Services	0.8%	4.7%
Basic Materials	-	0.5%
Consumer Cyclical	-	5.2%
Consumer Defensive	-	0.2%
Energy	-	3.5%
Healthcare	-	0.2%
Industrials	-	20.7%
Real Estate	-	-
Utilities	-	10.8%

Return for Risk

XLKI vs. TRFM — Risk / Return Rank

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

XLKI

XLKI Risk / Return Rank: 51
XLKI Sharpe Ratio Rank: 46
XLKI Sortino Ratio Rank: 43
XLKI Omega Ratio Rank: 47
XLKI Calmar Ratio Rank: 57
XLKI Martin Ratio Rank: 60

TRFM

TRFM Risk / Return Rank: 54
TRFM Sharpe Ratio Rank: 50
TRFM Sortino Ratio Rank: 48
TRFM Omega Ratio Rank: 46
TRFM Calmar Ratio Rank: 70
TRFM Martin Ratio Rank: 58

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.

XLKI vs. TRFM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for State Street Technology Select Sector SPDR Premium Income ETF (XLKI) and AAM Transformers ETF (TRFM). 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.

	XLKI	TRFM	Difference
Sharpe ratio: Return per unit of total volatility	1.13	1.24	-0.10
Sortino ratio: Return per unit of downside risk	1.61	1.73	-0.12
Omega ratio: Gain probability vs. loss probability	1.22	1.21	0.00
Calmar ratio: Return relative to maximum drawdown	2.02	2.43	-0.41
Martin ratio: Return relative to average drawdown	7.10	6.98	+0.13

XLKI vs. TRFM - Sharpe Ratio Comparison

The current XLKI Sharpe Ratio is 1.13, which is comparable to the TRFM Sharpe Ratio of 1.24. The chart below compares the historical Sharpe Ratios of XLKI and TRFM, 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

XLKI vs. TRFM - Drawdown Comparison

The maximum XLKI drawdown since its inception was -11.21%, smaller than the maximum TRFM drawdown of -28.40%. Use the drawdown chart below to compare losses from any high point for XLKI and TRFM.

Drawdown Indicators

	XLKI	TRFM	Difference
Max Drawdown Largest peak-to-trough decline	-11.21%	-28.40%	+17.19%
Max Drawdown (1Y) Largest decline over 1 year	-11.21%	-12.99%	+1.78%
Max Drawdown (3Y) Largest decline over 3 years	—	-28.40%	—
Current Drawdown Current decline from peak	-6.73%	-8.52%	+1.79%
Average Drawdown Average peak-to-trough decline	-2.16%	-6.56%	+4.40%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.18%	4.52%	-1.34%

Volatility

XLKI vs. TRFM - Volatility Comparison

State Street Technology Select Sector SPDR Premium Income ETF (XLKI) has a higher volatility of 8.68% compared to AAM Transformers ETF (TRFM) at 7.74%. This indicates that XLKI's price experiences larger fluctuations and is considered to be riskier than TRFM based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	XLKI	TRFM	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.68%	7.74%	+0.94%
Volatility (6M) Calculated over the trailing 6-month period	17.55%	20.87%	-3.32%
Volatility (1Y) Calculated over the trailing 1-year period	19.96%	25.57%	-5.61%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.92%	27.26%	-7.34%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.92%	27.26%	-7.34%

XLKI vs. TRFM - Expense Ratio Comparison

XLKI has a 0.35% expense ratio, which is lower than TRFM's 0.49% expense ratio.

Dividends

XLKI vs. TRFM - Dividend Comparison

XLKI's dividend yield for the trailing twelve months is around 17.91%, more than TRFM's 0.14% yield.

Position	TTM	2025
TRFM AAM Transformers ETF	0.14%	0.17%
XLKI State Street Technology Select Sector SPDR Premium Income ETF	17.91%	8.52%

Frequently Asked Questions

Can I hold both XLKI and TRFM in my portfolio?

XLKI and TRFM have a correlation of 0.88, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, XLKI or TRFM?

XLKI has higher volatility (8.68%) compared to TRFM (7.74%). In terms of maximum drawdown, XLKI dropped -11.21% vs TRFM's -28.40%.

Which ETF is better, XLKI or TRFM?

On 1-year performance, TRFM leads with 34.05% vs 24.59% for XLKI. On fees, XLKI is cheaper at 0.35% per year. On volatility, TRFM has been the lower-risk option at 7.74%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, XLKI or TRFM?

Over the 1-year period, TRFM has performed better with a 34.05% return vs 24.59%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, XLKI or TRFM?

XLKI is cheaper with a 0.35% expense ratio, compared with 0.49% for TRFM.

Which ETF pays a higher dividend yield, XLKI or TRFM?

XLKI has the higher dividend yield at 17.91%, compared with 0.14% for TRFM.

What is the main difference between XLKI and TRFM?

They also come from different issuers: State Street and AAM. Their fees differ too: 0.35% for XLKI and 0.49% for TRFM.

Which has better risk-adjusted returns?

TRFM currently has the higher Sharpe Ratio (1.24 vs 1.13), 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.