SPMO vs. TMDIX

Last updated Jun 10, 2026

SPMO (Invesco S&P 500 Momentum ETF) and TMDIX (AMG TimesSquare Mid Cap Growth Fund) are both funds - SPMO is a Momentum fund tracking the S&P 500 Momentum Index, while TMDIX is a Mid Cap Growth Equities fund managed by AMG. Over the past 10 years, SPMO returned 20.35%/yr vs 12.65%/yr for TMDIX. A 0.72 correlation means they provide meaningful diversification when combined. SPMO charges 0.13%/yr vs 0.98%/yr for TMDIX.

Performance

SPMO vs. TMDIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco S&P 500 Momentum ETF (SPMO) and AMG TimesSquare Mid Cap Growth Fund (TMDIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SPMO achieves a 23.98% return, which is significantly higher than TMDIX's 1.85% return. Over the past 10 years, SPMO has outperformed TMDIX with an annualized return of 20.35%, while TMDIX has yielded a comparatively lower 12.65% annualized return.

SPMO

• 1D: -0.25%
• 1M: 2.57%
• YTD: 23.98%
• 6M: 22.84%
• 1Y: 39.21%
• 3Y*: 40.17%
• 5Y*: 22.76%
• 10Y*: 20.35%

TMDIX

• 1D: -3.12%
• 1M: 2.09%
• YTD: 1.85%
• 6M: -10.01%
• 1Y: -6.92%
• 3Y*: 7.87%
• 5Y*: 3.86%
• 10Y*: 12.65%

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

SPMO vs. TMDIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SPMO Invesco S&P 500 Momentum ETF	23.98%	26.58%	45.82%	17.56%	-10.45%	22.64%	28.25%	25.93%	-0.92%	27.76%
TMDIX AMG TimesSquare Mid Cap Growth Fund	1.85%	-1.76%	10.84%	25.07%	-22.26%	16.75%	33.42%	63.26%	-4.28%	22.66%

Correlation

The correlation between SPMO and TMDIX is 0.69, 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	0.69
Correlation (3Y) Calculated over the trailing 3-year period	0.73
Correlation (5Y) Calculated over the trailing 5-year period	0.75
Correlation (10Y) Calculated over the trailing 10-year period	0.74
Correlation (All Time) Calculated using the full available price history since Oct 12, 2015	0.72

The correlation between SPMO and TMDIX has been stable across timeframes, ranging from 0.69 to 0.75 - a consistent structural relationship.

Return for Risk

SPMO vs. TMDIX — Risk / Return Rank

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

SPMO

SPMO Risk / Return Rank: 71
SPMO Sharpe Ratio Rank: 73
SPMO Sortino Ratio Rank: 69
SPMO Omega Ratio Rank: 74
SPMO Calmar Ratio Rank: 69
SPMO Martin Ratio Rank: 71

TMDIX

TMDIX Risk / Return Rank: 2
TMDIX Sharpe Ratio Rank: 2
TMDIX Sortino Ratio Rank: 2
TMDIX Omega Ratio Rank: 2
TMDIX Calmar Ratio Rank: 2
TMDIX Martin Ratio Rank: 2

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.

SPMO vs. TMDIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco S&P 500 Momentum ETF (SPMO) and AMG TimesSquare Mid Cap Growth Fund (TMDIX). 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.

	SPMO	TMDIX	Difference
Sharpe ratio: Return per unit of total volatility	2.11	-0.32	+2.43
Sortino ratio: Return per unit of downside risk	2.79	-0.29	+3.08
Omega ratio: Gain probability vs. loss probability	1.39	0.96	+0.43
Calmar ratio: Return relative to maximum drawdown	3.10	-0.25	+3.35
Martin ratio: Return relative to average drawdown	11.87	-0.53	+12.39
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SPMO vs. TMDIX - Sharpe Ratio Comparison

The current SPMO Sharpe Ratio is 2.11, which is higher than the TMDIX Sharpe Ratio of -0.32. The chart below compares the historical Sharpe Ratios of SPMO and TMDIX, 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

	SPMO	TMDIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.11	-0.32	+2.43
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	1.17	0.19	+0.98
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	1.00	0.60	+0.40
Sharpe Ratio (All Time) Calculated using the full available price history	0.98	0.53	+0.45

Drawdowns

SPMO vs. TMDIX - Drawdown Comparison

The maximum SPMO drawdown since its inception was -30.95%, smaller than the maximum TMDIX drawdown of -48.73%. Use the drawdown chart below to compare losses from any high point for SPMO and TMDIX.

Drawdown Indicators

	SPMO	TMDIX	Difference
Max Drawdown Largest peak-to-trough decline	-30.95%	-48.73%	+17.78%
Max Drawdown (1Y) Largest decline over 1 year	-12.70%	-25.45%	+12.75%
Max Drawdown (3Y) Largest decline over 3 years	-20.13%	-25.45%	+5.32%
Max Drawdown (5Y) Largest decline over 5 years	-22.74%	-30.53%	+7.79%
Max Drawdown (10Y) Largest decline over 10 years	-30.95%	-35.44%	+4.49%
Current Drawdown Current decline from peak	-4.89%	-14.72%	+9.83%
Average Drawdown Average peak-to-trough decline	-4.60%	-7.16%	+2.56%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.31%	12.17%	-8.86%

Volatility

SPMO vs. TMDIX - Volatility Comparison

Invesco S&P 500 Momentum ETF (SPMO) has a higher volatility of 8.94% compared to AMG TimesSquare Mid Cap Growth Fund (TMDIX) at 5.23%. This indicates that SPMO's price experiences larger fluctuations and is considered to be riskier than TMDIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SPMO	TMDIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.94%	5.23%	+3.71%
Volatility (6M) Calculated over the trailing 6-month period	15.83%	17.40%	-1.57%
Volatility (1Y) Calculated over the trailing 1-year period	18.68%	19.79%	-1.11%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.50%	20.42%	-0.92%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.41%	21.10%	-0.69%

SPMO vs. TMDIX - Expense Ratio Comparison

SPMO has a 0.13% expense ratio, which is lower than TMDIX's 0.98% expense ratio.

Dividends

SPMO vs. TMDIX - Dividend Comparison

SPMO's dividend yield for the trailing twelve months is around 0.69%, while TMDIX has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SPMO Invesco S&P 500 Momentum ETF	0.69%	0.73%	0.48%	1.63%	1.66%	0.52%	1.27%	1.39%	1.05%	0.77%	1.94%	0.36%
TMDIX AMG TimesSquare Mid Cap Growth Fund	0.00%	0.00%	8.08%	3.98%	3.69%	29.72%	18.28%	31.06%	16.38%	14.44%	5.90%	7.73%

Frequently Asked Questions

Can I hold both SPMO and TMDIX in my portfolio?

SPMO and TMDIX have a correlation of 0.69, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SPMO or TMDIX?

SPMO has higher volatility (8.94%) compared to TMDIX (5.23%). In terms of maximum drawdown, SPMO dropped -30.95% vs TMDIX's -48.73%.

Which has better risk-adjusted returns?

SPMO currently has the higher Sharpe Ratio (2.11 vs -0.32), 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.