What if you'd held PACB?
A $1,000 investment in Pacific Biosciences of California, Inc. (PACB) at the month-end close of 2010-10 would be worth $75.60 at the close of 2026-08 — -92.4% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $6,514.
Your scenario
Result
If you'd bought $1,000 at the start of each year
Value of $1,000 invested on January 1 of each year, held to 2026-08, dividends included.
Every year, $1,000 from 2010
| Year | Value of $1,000 | Year return |
|---|---|---|
| 2010 | $1,000 | — |
| 2011 | $176 | -82.4% |
| 2012 | $107 | -39.3% |
| 2013 | $329 | +207.6% |
| 2014 | $493 | +49.9% |
| 2015 | $825 | +67.5% |
| 2016 | $239 | -71.1% |
| 2017 | $166 | -30.5% |
| 2018 | $465 | +180.3% |
| 2019 | $323 | -30.5% |
| 2020 | $1,630 | +404.7% |
| 2021 | $1,286 | -21.1% |
| 2022 | $514 | -60.0% |
| 2023 | $617 | +19.9% |
| 2024 | $115 | -81.3% |
| 2025 | $118 | +2.2% |
| 2026 | $79.82 | -32.1% |
Best and worst month-end to buy
The best single month-end close to have bought PACB was 2025-05 ($0.96): $1,000 then is $1,323 today. The worst was 2021-06 ($34.97): $1,000 then is $36.32.
FAQ
What would $1,000 in PACB be worth today?
A $1,000 investment in Pacific Biosciences of California, Inc. (PACB) at the start of 2010 would be worth about $75.60 today, a total return of -92.4%. Dividends are reinvested in these figures.
What were the best and worst years for PACB?
Pacific Biosciences of California, Inc. (PACB)'s strongest calendar year since 2010 was 2020, a +404.7% return — $1,000 held through that year became about $5,047 by year-end. Its weakest year was 2011, at -82.4%.
Does the calculator include dividends and splits?
Yes where available. Prices are adjusted for both stock splits and reinvested dividends (total return), the same measure brokerages use.
How much would $100 per month in PACB have grown?
Investing $100 at the end of every month since 2010-10 would have grown to about $6,497 on $19,100 invested.
Did PACB beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $6,514. PACB trailed the S&P 500 by +98.8% in total return.
Is this investment advice?
No. Wall Street Regrets is an entertainment and education tool. Every number is a historical calculation, not a prediction, and past performance never guarantees future results.
Methodology
Pacific Biosciences of California, Inc. (PACB) historical total-return data from 2010-10 to 2026-08, reduced to month-end closes for the tables above.
Returns use adjusted close prices from Yahoo Finance historical data — adjusted for stock splits and reinvested dividends — the same convention used by major brokerages. A "year" scenario invests $1,000 at the prior December's month-end close and values it at the latest available month-end close. Non-USD amounts are converted at historical month-end exchange rates (Yahoo Finance): to USD on the buy date and back to your currency at the latest rate, so the return reflects the currency move as well as the asset.
Month-end resolution means intra-month extremes are not captured in tables; the calculator uses exact trading-day closes where daily data is available. Figures ignore taxes, fees, and the currency effects of non-USD listings. History is not a forecast. Wall Street Regrets is entertainment, not investment advice.
What if you'd held…
Data: adjusted close prices via Yahoo Finance. As of 2026-08. Not financial advice.