ISRG vs. ASTS

Last updated Jun 9, 2026

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

Performance

ISRG vs. ASTS - Performance Comparison

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

Returns By Period

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

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%

ASTS

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

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

ISRG vs. ASTS - Yearly Performance Comparison

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

Correlation

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

Fundamentals

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

Return for Risk

ISRG vs. ASTS — Risk / Return Rank

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

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

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

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.

ISRG vs. ASTS - Risk-Adjusted Trends Comparison

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

	ISRG	ASTS	Difference
Sharpe ratio: Return per unit of total volatility	-0.81	1.88	-2.68
Sortino ratio: Return per unit of downside risk	-1.14	2.44	-3.58
Omega ratio: Gain probability vs. loss probability	0.87	1.28	-0.42
Calmar ratio: Return relative to maximum drawdown	-0.78	4.12	-4.90
Martin ratio: Return relative to average drawdown	-1.60	8.15	-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.

ISRG vs. ASTS - Sharpe Ratio Comparison

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

	ISRG	ASTS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.81	1.88	-2.68
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.25	0.50	-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	0.48	0.40	+0.07

Drawdowns

ISRG vs. ASTS - Drawdown Comparison

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

Drawdown Indicators

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

Volatility

ISRG vs. ASTS - Volatility Comparison

The current volatility for Intuitive Surgical, Inc. (ISRG) is 11.58%, while AST SpaceMobile, Inc. (ASTS) has a volatility of 40.76%. This indicates that ISRG experiences smaller price fluctuations and is considered to be less risky than ASTS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

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

Dividends

ISRG vs. ASTS - Dividend Comparison

Neither ISRG nor ASTS has paid dividends to shareholders.

Tickers have no history of dividend payments

Financials

Frequently Asked Questions

Can I hold both ISRG and ASTS in my portfolio?

ISRG and ASTS 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, ISRG or ASTS?

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

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.