AM vs. SPYM

Last updated Jul 17, 2026

AM (Antero Midstream Corporation) is a stock, while SPYM (State Street SPDR Portfolio S&P 500 ETF) is S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, AM returned 7.09%/yr vs 15.19%/yr for SPYM. At a 0.33 correlation, their price movements are largely independent.

Performance

AM vs. SPYM - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Antero Midstream Corporation (AM) and State Street SPDR Portfolio S&P 500 ETF (SPYM). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AM achieves a 31.35% return, which is significantly higher than SPYM's 10.74% return. Over the past 10 years, AM has underperformed SPYM with an annualized return of 7.09%, while SPYM has yielded a comparatively higher 15.19% annualized return.

AM

• 1D: 1.92%
• 1M: 6.53%
• 6M: 30.99%
• YTD: 31.35%
• 1Y: 36.52%
• 3Y*: 32.77%
• 5Y*: 27.39%
• 10Y*: 7.09%

SPYM

• 1D: -0.53%
• 1M: 0.32%
• 6M: 9.08%
• YTD: 10.74%
• 1Y: 21.71%
• 3Y*: 20.10%
• 5Y*: 13.32%
• 10Y*: 15.19%

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

AM vs. SPYM - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AM Antero Midstream Corporation	31.35%	24.37%	28.46%	25.73%	21.98%	39.55%	27.59%	-60.29%	-22.28%	-2.32%
SPYM State Street SPDR Portfolio S&P 500 ETF	10.74%	17.79%	25.00%	26.24%	-18.09%	28.78%	18.49%	31.99%	-4.78%	21.30%

Correlation

The correlation between AM and SPYM is -0.09, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.09
Correlation (3Y) Calculated over the trailing 3-year period	0.25
Correlation (5Y) Calculated over the trailing 5-year period	0.40
Correlation (10Y) Calculated over the trailing 10-year period	0.34
Correlation (All Time) Calculated using the full available price history since Nov 5, 2014	0.33

The correlation between AM and SPYM shifts across timeframes, from -0.09 (1 year) to 0.40 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

AM vs. SPYM — Risk / Return Rank

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

AM

AM Risk / Return Rank: 85
AM Sharpe Ratio Rank: 88
AM Sortino Ratio Rank: 86
AM Omega Ratio Rank: 83
AM Calmar Ratio Rank: 86
AM Martin Ratio Rank: 82

SPYM

SPYM Risk / Return Rank: 66
SPYM Sharpe Ratio Rank: 66
SPYM Sortino Ratio Rank: 64
SPYM Omega Ratio Rank: 66
SPYM Calmar Ratio Rank: 61
SPYM Martin Ratio Rank: 73

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.

AM vs. SPYM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Antero Midstream Corporation (AM) and State Street SPDR Portfolio S&P 500 ETF (SPYM). 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.

	AM	SPYM	Difference
Sharpe ratio: Return per unit of total volatility	1.77	1.74	+0.03
Sortino ratio: Return per unit of downside risk	2.52	2.40	+0.12
Omega ratio: Gain probability vs. loss probability	1.30	1.32	-0.02
Calmar ratio: Return relative to maximum drawdown	2.90	2.45	+0.45
Martin ratio: Return relative to average drawdown	6.12	10.67	-4.56

AM vs. SPYM - Sharpe Ratio Comparison

The current AM Sharpe Ratio is 1.77, which is comparable to the SPYM Sharpe Ratio of 1.74. The chart below compares the historical Sharpe Ratios of AM and SPYM, 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

AM vs. SPYM - Drawdown Comparison

The maximum AM drawdown since its inception was -93.01%, which is greater than SPYM's maximum drawdown of -54.46%. Use the drawdown chart below to compare losses from any high point for AM and SPYM.

Drawdown Indicators

	AM	SPYM	Difference
Max Drawdown Largest peak-to-trough decline	-93.01%	-54.46%	-38.55%
Max Drawdown (1Y) Largest decline over 1 year	-12.67%	-8.90%	-3.77%
Max Drawdown (3Y) Largest decline over 3 years	-13.98%	-18.72%	+4.74%
Max Drawdown (5Y) Largest decline over 5 years	-21.91%	-24.48%	+2.57%
Max Drawdown (10Y) Largest decline over 10 years	-93.01%	-33.87%	-59.14%
Current Drawdown Current decline from peak	-2.17%	-0.88%	-1.29%
Average Drawdown Average peak-to-trough decline	-31.67%	-7.12%	-24.55%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.99%	2.04%	+3.95%

Volatility

AM vs. SPYM - Volatility Comparison

Antero Midstream Corporation (AM) has a higher volatility of 6.50% compared to State Street SPDR Portfolio S&P 500 ETF (SPYM) at 3.55%. This indicates that AM's price experiences larger fluctuations and is considered to be riskier than SPYM based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AM	SPYM	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.50%	3.55%	+2.95%
Volatility (6M) Calculated over the trailing 6-month period	14.65%	10.00%	+4.65%
Volatility (1Y) Calculated over the trailing 1-year period	20.77%	12.54%	+8.23%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	26.35%	16.92%	+9.43%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	41.88%	17.99%	+23.89%

Dividends

AM vs. SPYM - Dividend Comparison

AM's dividend yield for the trailing twelve months is around 3.94%, more than SPYM's 1.03% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AM Antero Midstream Corporation	3.94%	5.06%	5.96%	7.18%	8.34%	10.15%	15.95%	18.28%	7.53%	4.27%	3.14%	2.93%
SPYM State Street SPDR Portfolio S&P 500 ETF	1.03%	1.13%	1.28%	1.44%	1.69%	1.25%	1.54%	1.79%	2.23%	1.75%	1.97%	1.98%

Frequently Asked Questions

Can I hold both AM and SPYM in my portfolio?

AM and SPYM have a correlation of -0.09, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, AM or SPYM?

AM has higher volatility (6.50%) compared to SPYM (3.55%). In terms of maximum drawdown, AM dropped -93.01% vs SPYM's -54.46%.

Which has better risk-adjusted returns?

AM currently has the higher Sharpe Ratio (1.77 vs 1.74), 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.