ISRG vs VST: Which Is the Better Buy?
Side-by-side comparison of Intuitive Surgical, Inc. and Vistra Corp. — fair value, conviction, valuation metrics, and QuantHub research signals.
Updated 2026-08-06.
Intuitive Surgical, Inc. · Healthcare
$388.97
+45.0% upside to fair value
Grade B
High Quality
VS
Vistra Corp. · Utilities
$140.58
+20.9% upside to fair value
Med Conviction
Grade B
QuantHub Verdict
ISRG has more upside to fair value
(+45.0%).
VST trades at a lower forward P/E
(15.4x).
These are model outputs — not personalized investment advice.
See all research →
Valuation & Fundamentals
| Metric |
ISRG |
VST |
| Current Price |
$388.97 |
$140.58 |
| Fair Value Estimate |
$564.01 |
$170.00 |
| Upside to Fair Value |
+45.0%
|
+20.9%
|
| Market Cap |
$137.8B |
$47.4B |
| Forward P/E |
46.5x
|
15.4x
|
| EV / EBITDA |
31.4x
|
9.3x
|
| Price / Sales |
13.0x
|
2.9x
|
| Price / FCF |
48.6x
|
42.5x
|
| Revenue Growth YoY |
+23.0%
|
+20.0%
|
| Gross Margin |
66.3%
|
12.7%
|
| Operating Margin |
30.5%
|
2.1%
|
| Return on Equity |
17.0%
|
35.0%
|
| Dividend Yield |
0% |
0.65% |
| FCF Yield |
2.06%
|
2.4%
|
| Analyst Consensus |
Strong Buy
|
Strong Buy
|
Investment Thesis
Intuitive Surgical, Inc. operates in the healthcare sector, specializing in medical devices with a strong focus on robotic-assisted surgery systems. The company demonstrates high business quality with a durable competitive moat supported by a 17.0% return on equity, robust gross margin of 66.3%, and solid operating margin of 30.5%. Revenue and earnings growth in the most recent quarter were impre…
Vistra is an integrated merchant power producer and retail electricity supplier with roughly 38,700 MW of generation across natural gas, nuclear, coal, solar and battery storage, plus a roughly 4.3 million customer retail book (TXU and affiliated brands) across 20 states. The 2024 Energy Harbor deal made it the second-largest nuclear operator in the US, and that nuclear and gas fleet is now centr…
Accumulation Zones
| Metric |
ISRG |
VST |
| Zone Low |
$423.01 |
$128.00 |
| Zone High |
$479.41 |
$145.00 |
| In Buy Zone? |
Yes
|
Yes
|