AMS vs. AMPY

Last updated Jun 3, 2026

AMS (American Shared Hospital Services) and AMPY (Amplify Energy Corp.) are both stocks. AMS operates in Medical Care Facilities (Healthcare), while AMPY operates in Oil & Gas E&P (Energy). Over the past 10 years, AMS returned -3.85%/yr vs 23.17%/yr for AMPY. At a 0.07 correlation, their price movements are largely independent.

Performance

AMS vs. AMPY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Shared Hospital Services (AMS) and Amplify Energy Corp. (AMPY). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AMS achieves a -36.02% return, which is significantly lower than AMPY's 4.16% return. Over the past 10 years, AMS has underperformed AMPY with an annualized return of -3.85%, while AMPY has yielded a comparatively higher 23.17% annualized return.

AMS

• 1D: -6.90%
• 1M: -20.59%
• YTD: -36.02%
• 6M: -34.78%
• 1Y: -43.51%
• 3Y*: -22.14%
• 5Y*: -15.21%
• 10Y*: -3.85%

AMPY

• 1D: -0.21%
• 1M: -23.35%
• YTD: 4.16%
• 6M: -15.60%
• 1Y: 50.63%
• 3Y*: -12.48%
• 5Y*: 4.17%
• 10Y*: 23.17%

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

AMS vs. AMPY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AMS American Shared Hospital Services	-36.02%	-33.86%	34.07%	-18.79%	23.63%	6.76%	-9.02%	2.52%	-8.46%	-22.39%
AMPY Amplify Energy Corp.	4.16%	-23.83%	1.18%	-32.54%	182.64%	137.40%	-77.85%	-5.47%	-54.70%	-20.06%

Correlation

The correlation between AMS and AMPY is -0.06, 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	-0.06
Correlation (3Y) Calculated over the trailing 3-year period	0.03
Correlation (5Y) Calculated over the trailing 5-year period	0.11
Correlation (10Y) Calculated over the trailing 10-year period	0.09
Correlation (All Time) Calculated using the full available price history since Apr 23, 2012	0.07

The correlation between AMS and AMPY shifts across timeframes, from -0.06 (1 year) to 0.11 (5 years), reflecting how their relationship changes across market environments.

Fundamentals

Market Cap AMS : $9.02M AMPY : $195.84M
EPS AMS : -$0.23 AMPY : $0.29
PS Ratio AMS : 0.32 AMPY : 0.84
PB Ratio AMS : 0.00 AMPY : 0.47
Total Revenue (TTM) AMS : $28.08M AMPY : $228.78M
Gross Profit (TTM) AMS : $5.06M AMPY : $131.23M
EBITDA (TTM) AMS : $4.05B AMPY : $84.62M

Return for Risk

AMS vs. AMPY — Risk / Return Rank

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

AMS

AMS Risk / Return Rank: 10
AMS Sharpe Ratio Rank: 11
AMS Sortino Ratio Rank: 11
AMS Omega Ratio Rank: 11
AMS Calmar Ratio Rank: 12
AMS Martin Ratio Rank: 6

AMPY

AMPY Risk / Return Rank: 67
AMPY Sharpe Ratio Rank: 65
AMPY Sortino Ratio Rank: 63
AMPY Omega Ratio Rank: 60
AMPY Calmar Ratio Rank: 75
AMPY Martin Ratio Rank: 72

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.

AMS vs. AMPY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Shared Hospital Services (AMS) and Amplify Energy Corp. (AMPY). 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.

	AMS	AMPY	Difference
Sharpe ratio Return per unit of total volatility	-0.72	0.76	-1.48
Sortino ratio Return per unit of downside risk	-0.94	1.45	-2.39
Omega ratio Gain probability vs. loss probability	0.87	1.17	-0.30
Calmar ratio Return relative to maximum drawdown	-0.76	2.10	-2.86
Martin ratio Return relative to average drawdown	-1.46	4.40	-5.85
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AMS vs. AMPY - Sharpe Ratio Comparison

The current AMS Sharpe Ratio is -0.72, which is lower than the AMPY Sharpe Ratio of 0.76. The chart below compares the historical Sharpe Ratios of AMS and AMPY, 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

	AMS	AMPY	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.72	0.76	-1.48
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.33	0.06	-0.39
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	-0.06	0.02	-0.09
Sharpe Ratio (All Time) Calculated using the full available price history	-0.04	-0.01	-0.03

Drawdowns

AMS vs. AMPY - Drawdown Comparison

The maximum AMS drawdown since its inception was -98.40%, roughly equal to the maximum AMPY drawdown of -97.31%. Use the drawdown chart below to compare losses from any high point for AMS and AMPY.

Drawdown Indicators

	AMS	AMPY	Difference
Max Drawdown Largest peak-to-trough decline	-98.40%	-97.31%	-1.09%
Max Drawdown (1Y) Largest decline over 1 year	-57.57%	-31.37%	-26.20%
Max Drawdown (3Y) Largest decline over 3 years	-64.17%	-71.11%	+6.94%
Max Drawdown (5Y) Largest decline over 5 years	-65.04%	-77.47%	+12.43%
Max Drawdown (10Y) Largest decline over 10 years	-73.26%	-97.24%	+23.98%
Current Drawdown Current decline from peak	-85.55%	-74.77%	-10.78%
Average Drawdown Average peak-to-trough decline	-67.44%	-66.40%	-1.04%
Ulcer Index Depth and duration of drawdowns from previous peaks	30.23%	14.97%	+15.26%

Volatility

AMS vs. AMPY - Volatility Comparison

American Shared Hospital Services (AMS) has a higher volatility of 29.59% compared to Amplify Energy Corp. (AMPY) at 16.17%. This indicates that AMS's price experiences larger fluctuations and is considered to be riskier than AMPY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AMS	AMPY	Difference
Volatility (1M) Calculated over the trailing 1-month period	29.59%	16.17%	+13.42%
Volatility (6M) Calculated over the trailing 6-month period	48.63%	40.61%	+8.02%
Volatility (1Y) Calculated over the trailing 1-year period	60.82%	67.44%	-6.62%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	46.18%	67.39%	-21.21%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	59.93%	980.38%	-920.45%

Dividends

AMS vs. AMPY - Dividend Comparison

Neither AMS nor AMPY has paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019
AMPY Amplify Energy Corp.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	7.63%	6.05%
AMS American Shared Hospital Services	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Financials

Frequently Asked Questions

Can I hold both AMS and AMPY in my portfolio?

AMS and AMPY have a correlation of -0.06, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, AMS or AMPY?

AMS has higher volatility (29.59%) compared to AMPY (16.17%). In terms of maximum drawdown, AMS dropped -98.40% vs AMPY's -97.31%.

Which has better risk-adjusted returns?

AMPY currently has the higher Sharpe Ratio (0.76 vs -0.72), 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.