PHO vs. IDMO

Last updated Jul 18, 2026

PHO (Invesco Water Resources ETF) and IDMO (Invesco S&P International Developed Momentum ETF) are both exchange-traded funds - PHO is a Water Equities fund tracking the NASDAQ OMX US Water Index, while IDMO is a Momentum fund tracking the S&P Momentum Developed ex U.S. & South Korea LargeMidCap Index. Both are passively managed. Over the past 10 years, PHO returned 11.61%/yr vs 12.40%/yr for IDMO. At a 0.46 correlation, their price movements are largely independent. PHO charges 0.59%/yr vs 0.25%/yr for IDMO.

Performance

PHO vs. IDMO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco Water Resources ETF (PHO) and Invesco S&P International Developed Momentum ETF (IDMO). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PHO achieves a -1.62% return, which is significantly lower than IDMO's 7.56% return. Over the past 10 years, PHO has underperformed IDMO with an annualized return of 11.61%, while IDMO has yielded a comparatively higher 12.40% annualized return.

PHO

• 1D: -1.29%
• 1M: 3.57%
• 6M: -6.81%
• YTD: -1.62%
• 1Y: -1.91%
• 3Y*: 7.03%
• 5Y*: 5.35%
• 10Y*: 11.61%

IDMO

• 1D: -0.66%
• 1M: -2.44%
• 6M: 4.42%
• YTD: 7.56%
• 1Y: 20.05%
• 3Y*: 24.23%
• 5Y*: 15.34%
• 10Y*: 12.40%

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

PHO vs. IDMO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PHO Invesco Water Resources ETF	-1.62%	7.62%	8.59%	18.85%	-14.86%	31.28%	20.83%	37.57%	-6.40%	23.55%
IDMO Invesco S&P International Developed Momentum ETF	7.56%	42.17%	12.79%	20.16%	-12.03%	14.31%	22.01%	26.09%	-16.66%	29.21%

Correlation

The correlation between PHO and IDMO is 0.49, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.49
Correlation (3Y) Calculated over the trailing 3-year period	0.55
Correlation (5Y) Calculated over the trailing 5-year period	0.61
Correlation (10Y) Calculated over the trailing 10-year period	0.52
Correlation (All Time) Calculated using the full available price history since Feb 24, 2012	0.46

The correlation between PHO and IDMO shifts across timeframes, from 0.46 (all time) to 0.61 (5 years), reflecting how their relationship changes across market environments.

PHO vs. IDMO - Sectors Allocation Comparison

Sectors	PHO	IDMO
Industrials	53.8%	21.3%
Utilities	14.2%	7.9%
Technology	12.9%	6.2%
Healthcare	10.6%	1.1%
Basic Materials	8.6%	10.6%
Financial Services	0.0%	43.2%
Communication Services	-	2.1%
Consumer Cyclical	-	1.5%
Consumer Defensive	-	2.5%
Energy	-	1.7%
Real Estate	-	1.8%

Return for Risk

PHO vs. IDMO — Risk / Return Rank

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

PHO

PHO Risk / Return Rank: 8
PHO Sharpe Ratio Rank: 8
PHO Sortino Ratio Rank: 8
PHO Omega Ratio Rank: 8
PHO Calmar Ratio Rank: 8
PHO Martin Ratio Rank: 8

IDMO

IDMO Risk / Return Rank: 39
IDMO Sharpe Ratio Rank: 37
IDMO Sortino Ratio Rank: 37
IDMO Omega Ratio Rank: 36
IDMO Calmar Ratio Rank: 38
IDMO Martin Ratio Rank: 48

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.

PHO vs. IDMO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco Water Resources ETF (PHO) and Invesco S&P International Developed Momentum ETF (IDMO). 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.

	PHO	IDMO	Difference
Sharpe ratio: Return per unit of total volatility	-0.12	1.09	-1.21
Sortino ratio: Return per unit of downside risk	-0.07	1.63	-1.70
Omega ratio: Gain probability vs. loss probability	0.99	1.20	-0.21
Calmar ratio: Return relative to maximum drawdown	-0.14	1.64	-1.77
Martin ratio: Return relative to average drawdown	-0.32	6.39	-6.71

PHO vs. IDMO - Sharpe Ratio Comparison

The current PHO Sharpe Ratio is -0.12, which is lower than the IDMO Sharpe Ratio of 1.09. The chart below compares the historical Sharpe Ratios of PHO and IDMO, 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

PHO vs. IDMO - Drawdown Comparison

The maximum PHO drawdown since its inception was -55.62%, which is greater than IDMO's maximum drawdown of -39.38%. Use the drawdown chart below to compare losses from any high point for PHO and IDMO.

Drawdown Indicators

	PHO	IDMO	Difference
Max Drawdown Largest peak-to-trough decline	-55.62%	-39.38%	-16.24%
Max Drawdown (1Y) Largest decline over 1 year	-13.78%	-12.31%	-1.47%
Max Drawdown (3Y) Largest decline over 3 years	-19.19%	-12.65%	-6.54%
Max Drawdown (5Y) Largest decline over 5 years	-28.60%	-27.07%	-1.53%
Max Drawdown (10Y) Largest decline over 10 years	-34.92%	-31.34%	-3.58%
Current Drawdown Current decline from peak	-7.05%	-4.56%	-2.49%
Average Drawdown Average peak-to-trough decline	-10.17%	-9.70%	-0.47%
Ulcer Index Depth and duration of drawdowns from previous peaks	6.07%	3.14%	+2.93%

Volatility

PHO vs. IDMO - Volatility Comparison

The current volatility for Invesco Water Resources ETF (PHO) is 5.24%, while Invesco S&P International Developed Momentum ETF (IDMO) has a volatility of 5.90%. This indicates that PHO experiences smaller price fluctuations and is considered to be less risky than IDMO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PHO	IDMO	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.24%	5.90%	-0.66%
Volatility (6M) Calculated over the trailing 6-month period	11.84%	16.88%	-5.04%
Volatility (1Y) Calculated over the trailing 1-year period	15.57%	18.54%	-2.97%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.47%	18.13%	+0.34%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.46%	17.89%	+1.57%

PHO vs. IDMO - Expense Ratio Comparison

PHO has a 0.59% expense ratio, which is higher than IDMO's 0.25% expense ratio.

Dividends

PHO vs. IDMO - Dividend Comparison

PHO's dividend yield for the trailing twelve months is around 0.58%, less than IDMO's 3.72% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IDMO Invesco S&P International Developed Momentum ETF	3.72%	3.71%	2.24%	2.89%	3.66%	1.81%	1.63%	2.78%	3.27%	3.08%	2.18%	2.52%
PHO Invesco Water Resources ETF	0.58%	0.54%	0.45%	0.59%	0.49%	0.20%	0.39%	0.43%	0.46%	0.34%	0.47%	0.75%

Frequently Asked Questions

Can I hold both PHO and IDMO in my portfolio?

PHO and IDMO have a correlation of 0.49, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PHO or IDMO?

IDMO has higher volatility (5.90%) compared to PHO (5.24%). In terms of maximum drawdown, PHO dropped -55.62% vs IDMO's -39.38%.

Which ETF is better, PHO or IDMO?

On 10-year performance, IDMO leads with 12.40% vs 11.61% for PHO. On fees, IDMO is cheaper at 0.25% per year. On volatility, PHO has been the lower-risk option at 5.24%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, PHO or IDMO?

Over the 10-year period, IDMO has performed better with a 12.40% return vs 11.61%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, PHO or IDMO?

IDMO is cheaper with a 0.25% expense ratio, compared with 0.59% for PHO.

Which ETF pays a higher dividend yield, PHO or IDMO?

IDMO has the higher dividend yield at 3.72%, compared with 0.58% for PHO.

What is the main difference between PHO and IDMO?

PHO is categorized as Water Equities, while IDMO is Momentum. PHO tracks NASDAQ OMX US Water Index, while IDMO tracks S&P Momentum Developed ex U.S. & South Korea LargeMidCap Index. Their fees differ too: 0.59% for PHO and 0.25% for IDMO.

Which has better risk-adjusted returns?

IDMO currently has the higher Sharpe Ratio (1.09 vs -0.12), 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.