ASTS vs. ISRG

Last updated Jun 9, 2026

ASTS (AST SpaceMobile, Inc.) and ISRG (Intuitive Surgical, Inc.) are both stocks. ASTS operates in Telecom Services (Communication Services), while ISRG operates in Medical Instruments & Supplies (Healthcare). Over the past 5 years, ASTS returned 54.02%/yr vs 8.37%/yr for ISRG. At a 0.21 correlation, their price movements are largely independent.

Performance

ASTS vs. ISRG - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in AST SpaceMobile, Inc. (ASTS) and Intuitive Surgical, Inc. (ISRG). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ASTS achieves a 26.75% return, which is significantly higher than ISRG's -26.09% return.

ASTS

• 1D: -1.65%
• 1M: 22.66%
• YTD: 26.75%
• 6M: 24.41%
• 1Y: 195.16%
• 3Y*: 152.04%
• 5Y*: 54.02%
• 10Y*: —

ISRG

• 1D: -0.82%
• 1M: -6.99%
• YTD: -26.09%
• 6M: -26.16%
• 1Y: -24.86%
• 3Y*: 10.20%
• 5Y*: 8.37%
• 10Y*: 19.37%

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

ASTS vs. ISRG - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
ASTS AST SpaceMobile, Inc.	26.75%	244.22%	249.92%	25.10%	-39.29%	-41.53%	37.59%	1.02%
ISRG Intuitive Surgical, Inc.	-26.09%	8.51%	54.72%	27.14%	-26.15%	31.76%	38.39%	5.68%

Correlation

The correlation between ASTS and ISRG is 0.07, 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	0.07
Correlation (3Y) Calculated over the trailing 3-year period	0.19
Correlation (5Y) Calculated over the trailing 5-year period	0.24
Correlation (All Time) Calculated using the full available price history since Nov 4, 2019	0.21

The correlation between ASTS and ISRG shifts across timeframes, from 0.07 (1 year) to 0.24 (5 years), reflecting how their relationship changes across market environments.

Fundamentals

Market Cap ASTS : $26.76B ISRG : $150.62B
EPS ASTS : -$1.84 ISRG : $8.24
PS Ratio ASTS : 287.63 ISRG : 14.30
PB Ratio ASTS : 10.06 ISRG : 8.56
Total Revenue (TTM) ASTS : $84.94M ISRG : $10.58B
Gross Profit (TTM) ASTS : -$22.93M ISRG : $7.02B
EBITDA (TTM) ASTS : -$536.80M ISRG : $3.76B

Return for Risk

ASTS vs. ISRG — Risk / Return Rank

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

ASTS

ASTS Risk / Return Rank: 85
ASTS Sharpe Ratio Rank: 88
ASTS Sortino Ratio Rank: 83
ASTS Omega Ratio Rank: 79
ASTS Calmar Ratio Rank: 89
ASTS Martin Ratio Rank: 85

ISRG

ISRG Risk / Return Rank: 9
ISRG Sharpe Ratio Rank: 9
ISRG Sortino Ratio Rank: 10
ISRG Omega Ratio Rank: 11
ISRG Calmar Ratio Rank: 12
ISRG Martin Ratio Rank: 4

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.

ASTS vs. ISRG - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AST SpaceMobile, Inc. (ASTS) and Intuitive Surgical, Inc. (ISRG). 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.

	ASTS	ISRG	Difference
Sharpe ratio: Return per unit of total volatility	1.88	-0.81	+2.68
Sortino ratio: Return per unit of downside risk	2.44	-1.14	+3.58
Omega ratio: Gain probability vs. loss probability	1.28	0.87	+0.42
Calmar ratio: Return relative to maximum drawdown	4.12	-0.78	+4.90
Martin ratio: Return relative to average drawdown	8.15	-1.60	+9.75
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ASTS vs. ISRG - Sharpe Ratio Comparison

The current ASTS Sharpe Ratio is 1.88, which is higher than the ISRG Sharpe Ratio of -0.81. The chart below compares the historical Sharpe Ratios of ASTS and ISRG, 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

	ASTS	ISRG	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.88	-0.81	+2.68
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.50	0.25	+0.24
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.60	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.40	0.48	-0.07

Drawdowns

ASTS vs. ISRG - Drawdown Comparison

The maximum ASTS drawdown since its inception was -91.07%, which is greater than ISRG's maximum drawdown of -82.26%. Use the drawdown chart below to compare losses from any high point for ASTS and ISRG.

Drawdown Indicators

	ASTS	ISRG	Difference
Max Drawdown Largest peak-to-trough decline	-91.07%	-82.26%	-8.81%
Max Drawdown (1Y) Largest decline over 1 year	-47.69%	-32.14%	-15.55%
Max Drawdown (3Y) Largest decline over 3 years	-70.66%	-34.10%	-36.56%
Max Drawdown (5Y) Largest decline over 5 years	-85.57%	-49.90%	-35.67%
Max Drawdown (10Y) Largest decline over 10 years	—	-49.90%	—
Current Drawdown Current decline from peak	-30.83%	-31.43%	+0.60%
Average Drawdown Average peak-to-trough decline	-43.38%	-21.28%	-22.10%
Ulcer Index Depth and duration of drawdowns from previous peaks	24.06%	16.18%	+7.88%

Volatility

ASTS vs. ISRG - Volatility Comparison

AST SpaceMobile, Inc. (ASTS) has a higher volatility of 40.76% compared to Intuitive Surgical, Inc. (ISRG) at 11.58%. This indicates that ASTS's price experiences larger fluctuations and is considered to be riskier than ISRG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ASTS	ISRG	Difference
Volatility (1M) Calculated over the trailing 1-month period	40.76%	11.58%	+29.18%
Volatility (6M) Calculated over the trailing 6-month period	82.89%	20.48%	+62.41%
Volatility (1Y) Calculated over the trailing 1-year period	104.86%	31.02%	+73.84%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	109.43%	33.17%	+76.26%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	100.53%	32.39%	+68.14%

Dividends

ASTS vs. ISRG - Dividend Comparison

Neither ASTS nor ISRG has paid dividends to shareholders.

Tickers have no history of dividend payments

Financials

Frequently Asked Questions

Can I hold both ASTS and ISRG in my portfolio?

ASTS and ISRG have a correlation of 0.07, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ASTS or ISRG?

ASTS has higher volatility (40.76%) compared to ISRG (11.58%). In terms of maximum drawdown, ASTS dropped -91.07% vs ISRG's -82.26%.

Which has better risk-adjusted returns?

ASTS currently has the higher Sharpe Ratio (1.88 vs -0.81), 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.