FDTS vs. AIRR

Last updated Jun 4, 2026

FDTS (First Trust Developed Markets ex-US Small Cap AlphaDEX Fund) and AIRR (First Trust RBA American Industrial Renaissance ETF) are both exchange-traded funds - FDTS is a Foreign Small & Mid Cap Equities fund tracking the NASDAQ AlphaDEX DM Ex-US Small Cap Index, while AIRR is a Building & Construction fund tracking the Richard Bernstein Advisors American Industrial Renaissance (TR). Both are passively managed. Over the past 10 years, FDTS returned 10.50%/yr vs 21.89%/yr for AIRR. At a 0.40 correlation, their price movements are largely independent. FDTS charges 0.80%/yr vs 0.70%/yr for AIRR.

Performance

FDTS vs. AIRR - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in First Trust Developed Markets ex-US Small Cap AlphaDEX Fund (FDTS) and First Trust RBA American Industrial Renaissance ETF (AIRR). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FDTS achieves a 16.64% return, which is significantly lower than AIRR's 31.77% return. Over the past 10 years, FDTS has underperformed AIRR with an annualized return of 10.50%, while AIRR has yielded a comparatively higher 21.89% annualized return.

FDTS

• 1D: -1.14%
• 1M: -2.48%
• YTD: 16.64%
• 6M: 19.06%
• 1Y: 45.71%
• 3Y*: 25.36%
• 5Y*: 10.59%
• 10Y*: 10.50%

AIRR

• 1D: 0.54%
• 1M: 3.36%
• YTD: 31.77%
• 6M: 31.32%
• 1Y: 65.82%
• 3Y*: 37.10%
• 5Y*: 25.40%
• 10Y*: 21.89%

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

FDTS vs. AIRR - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FDTS First Trust Developed Markets ex-US Small Cap AlphaDEX Fund	16.64%	51.17%	2.44%	10.96%	-15.34%	11.79%	12.90%	18.71%	-23.71%	36.01%
AIRR First Trust RBA American Industrial Renaissance ETF	31.77%	27.92%	33.45%	31.43%	-2.08%	33.01%	17.17%	33.97%	-20.57%	16.28%

Correlation

The correlation between FDTS and AIRR is 0.57, 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	0.57
Correlation (3Y) Calculated over the trailing 3-year period	0.56
Correlation (5Y) Calculated over the trailing 5-year period	0.52
Correlation (10Y) Calculated over the trailing 10-year period	0.42
Correlation (All Time) Calculated using the full available price history since Mar 12, 2014	0.40

The correlation between FDTS and AIRR shifts across timeframes, from 0.40 (all time) to 0.57 (1 year), reflecting how their relationship changes across market environments.

FDTS vs. AIRR - Sectors Allocation Comparison

Sectors	FDTS	AIRR
Industrials	23.0%	84.6%
Consumer Cyclical	18.4%	-
Technology	13.4%	0.5%
Financial Services	11.7%	9.6%
Basic Materials	11.2%	-
Consumer Defensive	5.0%	-
Real Estate	4.3%	-
Energy	4.3%	3.8%
Healthcare	3.0%	-
Communication Services	3.0%	-
Utilities	2.7%	-

Return for Risk

FDTS vs. AIRR — Risk / Return Rank

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

FDTS

FDTS Risk / Return Rank: 76
FDTS Sharpe Ratio Rank: 82
FDTS Sortino Ratio Rank: 78
FDTS Omega Ratio Rank: 77
FDTS Calmar Ratio Rank: 73
FDTS Martin Ratio Rank: 71

AIRR

AIRR Risk / Return Rank: 78
AIRR Sharpe Ratio Rank: 79
AIRR Sortino Ratio Rank: 73
AIRR Omega Ratio Rank: 67
AIRR Calmar Ratio Rank: 87
AIRR Martin Ratio Rank: 86

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.

FDTS vs. AIRR - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for First Trust Developed Markets ex-US Small Cap AlphaDEX Fund (FDTS) and First Trust RBA American Industrial Renaissance ETF (AIRR). 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.

	FDTS	AIRR	Difference
Sharpe ratio: Return per unit of total volatility	2.69	2.61	+0.08
Sortino ratio: Return per unit of downside risk	3.52	3.37	+0.15
Omega ratio: Gain probability vs. loss probability	1.46	1.41	+0.05
Calmar ratio: Return relative to maximum drawdown	3.64	5.05	-1.41
Martin ratio: Return relative to average drawdown	13.32	18.68	-5.36
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FDTS vs. AIRR - Sharpe Ratio Comparison

The current FDTS Sharpe Ratio is 2.69, which is comparable to the AIRR Sharpe Ratio of 2.61. The chart below compares the historical Sharpe Ratios of FDTS and AIRR, 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

	FDTS	AIRR	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.69	2.61	+0.08
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.36	1.01	-0.65
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.42	0.84	-0.41
Sharpe Ratio (All Time) Calculated using the full available price history	0.37	0.67	-0.30

Drawdowns

FDTS vs. AIRR - Drawdown Comparison

The maximum FDTS drawdown since its inception was -51.26%, which is greater than AIRR's maximum drawdown of -42.37%. Use the drawdown chart below to compare losses from any high point for FDTS and AIRR.

Drawdown Indicators

	FDTS	AIRR	Difference
Max Drawdown Largest peak-to-trough decline	-51.26%	-42.37%	-8.89%
Max Drawdown (1Y) Largest decline over 1 year	-12.61%	-13.09%	+0.48%
Max Drawdown (3Y) Largest decline over 3 years	-13.19%	-27.95%	+14.76%
Max Drawdown (5Y) Largest decline over 5 years	-33.11%	-27.95%	-5.16%
Max Drawdown (10Y) Largest decline over 10 years	-51.26%	-42.37%	-8.89%
Current Drawdown Current decline from peak	-6.49%	-1.86%	-4.63%
Average Drawdown Average peak-to-trough decline	-10.65%	-7.43%	-3.22%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.44%	3.53%	-0.09%

Volatility

FDTS vs. AIRR - Volatility Comparison

The current volatility for First Trust Developed Markets ex-US Small Cap AlphaDEX Fund (FDTS) is 6.54%, while First Trust RBA American Industrial Renaissance ETF (AIRR) has a volatility of 7.87%. This indicates that FDTS experiences smaller price fluctuations and is considered to be less risky than AIRR based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FDTS	AIRR	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.54%	7.87%	-1.33%
Volatility (6M) Calculated over the trailing 6-month period	14.09%	19.82%	-5.73%
Volatility (1Y) Calculated over the trailing 1-year period	17.05%	25.40%	-8.35%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	29.28%	25.29%	+3.99%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	24.85%	26.29%	-1.44%

FDTS vs. AIRR - Expense Ratio Comparison

FDTS has a 0.80% expense ratio, which is higher than AIRR's 0.70% expense ratio.

Dividends

FDTS vs. AIRR - Dividend Comparison

FDTS's dividend yield for the trailing twelve months is around 2.58%, more than AIRR's 0.13% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AIRR First Trust RBA American Industrial Renaissance ETF	0.13%	0.19%	0.18%	0.23%	0.12%	0.05%	0.10%	0.20%	0.43%	0.30%	0.08%	0.47%
FDTS First Trust Developed Markets ex-US Small Cap AlphaDEX Fund	2.58%	2.94%	3.94%	2.90%	3.71%	3.01%	2.02%	2.30%	1.96%	2.08%	1.78%	1.73%

Frequently Asked Questions

Can I hold both FDTS and AIRR in my portfolio?

FDTS and AIRR have a correlation of 0.57, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FDTS or AIRR?

AIRR has higher volatility (7.87%) compared to FDTS (6.54%). In terms of maximum drawdown, FDTS dropped -51.26% vs AIRR's -42.37%.

Which ETF is better, FDTS or AIRR?

On 10-year performance, AIRR leads with 21.89% vs 10.50% for FDTS. On fees, AIRR is cheaper at 0.70% per year. On volatility, FDTS has been the lower-risk option at 6.54%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, FDTS or AIRR?

Over the 10-year period, AIRR has performed better with a 21.89% return vs 10.50%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, FDTS or AIRR?

AIRR is cheaper with a 0.70% expense ratio, compared with 0.80% for FDTS.

Which ETF pays a higher dividend yield, FDTS or AIRR?

FDTS has the higher dividend yield at 2.58%, compared with 0.13% for AIRR.

What is the main difference between FDTS and AIRR?

FDTS is categorized as Foreign Small & Mid Cap Equities, while AIRR is Building & Construction. FDTS tracks NASDAQ AlphaDEX DM Ex-US Small Cap Index, while AIRR tracks Richard Bernstein Advisors American Industrial Renaissance (TR). Their fees differ too: 0.80% for FDTS and 0.70% for AIRR.

Which has better risk-adjusted returns?

FDTS currently has the higher Sharpe Ratio (2.69 vs 2.61), 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.