ISRG vs. TLT

Last updated Jun 13, 2026

ISRG (Intuitive Surgical, Inc.) is a stock, while TLT (iShares 20+ Year Treasury Bond ETF) is Government Bonds fund tracking the ICE U.S. Treasury 20+ Year Bond Index. Over the past 10 years, ISRG returned 19.09%/yr vs -1.75%/yr for TLT. At a correlation of -0.13, they often move in opposite directions.

Performance

ISRG vs. TLT - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Intuitive Surgical, Inc. (ISRG) and iShares 20+ Year Treasury Bond ETF (TLT). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ISRG achieves a -27.42% return, which is significantly lower than TLT's 0.27% return. Over the past 10 years, ISRG has outperformed TLT with an annualized return of 19.09%, while TLT has yielded a comparatively lower -1.75% annualized return.

ISRG

• 1D: -0.45%
• 1M: -2.39%
• YTD: -27.42%
• 6M: -24.20%
• 1Y: -19.74%
• 3Y*: 9.23%
• 5Y*: 7.37%
• 10Y*: 19.09%

TLT

• 1D: -0.24%
• 1M: 2.93%
• YTD: 0.27%
• 6M: 0.45%
• 1Y: 3.88%
• 3Y*: -1.38%
• 5Y*: -6.53%
• 10Y*: -1.75%

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

ISRG vs. TLT - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ISRG Intuitive Surgical, Inc.	-27.42%	8.51%	54.72%	27.14%	-26.15%	31.76%	38.39%	23.43%	31.23%	72.64%
TLT iShares 20+ Year Treasury Bond ETF	0.27%	4.25%	-8.05%	2.77%	-31.23%	-4.60%	18.15%	14.12%	-1.61%	9.18%

Correlation

The correlation between ISRG and TLT is 0.19, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.19
Correlation (3Y) Calculated over the trailing 3-year period	0.16
Correlation (5Y) Calculated over the trailing 5-year period	0.12
Correlation (10Y) Calculated over the trailing 10-year period	0.02
Correlation (All Time) Calculated using the full available price history since Jul 26, 2002	-0.13

The correlation between ISRG and TLT shifts across timeframes, from -0.13 (all time) to 0.19 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

ISRG vs. TLT — Risk / Return Rank

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

ISRG

ISRG Risk / Return Rank: 16
ISRG Sharpe Ratio Rank: 15
ISRG Sortino Ratio Rank: 14
ISRG Omega Ratio Rank: 16
ISRG Calmar Ratio Rank: 20
ISRG Martin Ratio Rank: 14

TLT

TLT Risk / Return Rank: 14
TLT Sharpe Ratio Rank: 14
TLT Sortino Ratio Rank: 13
TLT Omega Ratio Rank: 13
TLT Calmar Ratio Rank: 14
TLT Martin Ratio Rank: 14

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. TLT - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Intuitive Surgical, Inc. (ISRG) and iShares 20+ Year Treasury Bond ETF (TLT). 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.

	ISRG	TLT	Difference
Sharpe ratio: Return per unit of total volatility	-0.65	0.30	-0.95
Sortino ratio: Return per unit of downside risk	-0.87	0.50	-1.37
Omega ratio: Gain probability vs. loss probability	0.90	1.06	-0.16
Calmar ratio: Return relative to maximum drawdown	-0.62	0.38	-1.00
Martin ratio: Return relative to average drawdown	-1.24	0.92	-2.17

ISRG vs. TLT - Sharpe Ratio Comparison

The current ISRG Sharpe Ratio is -0.65, which is lower than the TLT Sharpe Ratio of 0.30. The chart below compares the historical Sharpe Ratios of ISRG and TLT, 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

ISRG vs. TLT - Drawdown Comparison

The maximum ISRG drawdown since its inception was -82.26%, which is greater than TLT's maximum drawdown of -48.35%. Use the drawdown chart below to compare losses from any high point for ISRG and TLT.

Drawdown Indicators

	ISRG	TLT	Difference
Max Drawdown Largest peak-to-trough decline	-82.26%	-48.35%	-33.91%
Max Drawdown (1Y) Largest decline over 1 year	-32.14%	-7.58%	-24.56%
Max Drawdown (3Y) Largest decline over 3 years	-34.10%	-19.18%	-14.92%
Max Drawdown (5Y) Largest decline over 5 years	-49.90%	-43.70%	-6.20%
Max Drawdown (10Y) Largest decline over 10 years	-49.90%	-48.35%	-1.55%
Current Drawdown Current decline from peak	-32.66%	-40.12%	+7.46%
Average Drawdown Average peak-to-trough decline	-21.28%	-13.84%	-7.44%
Ulcer Index Depth and duration of drawdowns from previous peaks	16.00%	3.14%	+12.86%

Volatility

ISRG vs. TLT - Volatility Comparison

Intuitive Surgical, Inc. (ISRG) has a higher volatility of 9.70% compared to iShares 20+ Year Treasury Bond ETF (TLT) at 2.83%. This indicates that ISRG's price experiences larger fluctuations and is considered to be riskier than TLT based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ISRG	TLT	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.70%	2.83%	+6.87%
Volatility (6M) Calculated over the trailing 6-month period	20.72%	6.64%	+14.08%
Volatility (1Y) Calculated over the trailing 1-year period	30.69%	9.68%	+21.01%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	33.19%	15.85%	+17.34%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	32.40%	14.91%	+17.49%

Dividends

ISRG vs. TLT - Dividend Comparison

ISRG has not paid dividends to shareholders, while TLT's dividend yield for the trailing twelve months is around 4.56%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ISRG Intuitive Surgical, Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
TLT iShares 20+ Year Treasury Bond ETF	4.56%	4.43%	4.30%	3.38%	2.67%	1.50%	1.50%	2.27%	2.63%	2.43%	2.60%	2.61%

Frequently Asked Questions

Can I hold both ISRG and TLT in my portfolio?

ISRG and TLT have a correlation of 0.19, 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 TLT?

ISRG has higher volatility (9.70%) compared to TLT (2.83%). In terms of maximum drawdown, ISRG dropped -82.26% vs TLT's -48.35%.

Which has better risk-adjusted returns?

TLT currently has the higher Sharpe Ratio (0.30 vs -0.65), 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.