What if you'd held BIO?
A $1,000 investment in Bio-Rad Laboratories, Inc. Class A (BIO) at the month-end close of 1980-02 would be worth $137,094 at the close of 2026-08 — +13609.4% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $67,816.
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 1980
| Year | Value of $1,000 | Year return |
|---|---|---|
| 1980 | $1,000 | — |
| 1981 | $487 | -51.3% |
| 1982 | $450 | -7.7% |
| 1983 | $844 | +87.5% |
| 1984 | $719 | -14.8% |
| 1985 | $1,706 | +137.4% |
| 1986 | $1,941 | +13.7% |
| 1987 | $1,715 | -11.6% |
| 1988 | $1,913 | +11.5% |
| 1989 | $1,800 | -5.9% |
| 1990 | $2,081 | +15.6% |
| 1991 | $2,222 | +6.7% |
| 1992 | $1,926 | -13.3% |
| 1993 | $1,125 | -41.6% |
| 1994 | $3,122 | +177.5% |
| 1995 | $4,781 | +53.2% |
| 1996 | $5,062 | +5.9% |
| 1997 | $4,409 | -12.9% |
| 1998 | $3,544 | -19.6% |
| 1999 | $3,945 | +11.3% |
| 2000 | $5,366 | +36.0% |
| 2001 | $10,682 | +99.1% |
| 2002 | $13,061 | +22.3% |
| 2003 | $19,463 | +49.0% |
| 2004 | $19,362 | -0.5% |
| 2005 | $22,086 | +14.1% |
| 2006 | $27,850 | +26.1% |
| 2007 | $34,971 | +25.6% |
| 2008 | $25,417 | -27.3% |
| 2009 | $32,555 | +28.1% |
| 2010 | $35,049 | +7.7% |
| 2011 | $32,413 | -7.5% |
| 2012 | $35,454 | +9.4% |
| 2013 | $41,718 | +17.7% |
| 2014 | $40,688 | -2.5% |
| 2015 | $46,797 | +15.0% |
| 2016 | $61,519 | +31.5% |
| 2017 | $80,550 | +30.9% |
| 2018 | $78,373 | -2.7% |
| 2019 | $124,884 | +59.3% |
| 2020 | $196,740 | +57.5% |
| 2021 | $255,002 | +29.6% |
| 2022 | $141,914 | -44.3% |
| 2023 | $108,974 | -23.2% |
| 2024 | $110,871 | +1.7% |
| 2025 | $102,258 | -7.8% |
| 2026 | $122,936 | +20.2% |
Best and worst month-end to buy
The best single month-end close to have bought BIO was 1982-07 ($1.02): $1,000 then is $357,468 today. The worst was 2021-08 ($805): $1,000 then is $453.
FAQ
What would $1,000 in BIO be worth today?
A $1,000 investment in Bio-Rad Laboratories, Inc. Class A (BIO) at the start of 1980 would be worth about $137,094 today, a total return of +13609.4%. Dividends are reinvested in these figures.
What were the best and worst years for BIO?
Bio-Rad Laboratories, Inc. Class A (BIO)'s strongest calendar year since 1980 was 1994, a +177.5% return — $1,000 held through that year became about $2,775 by year-end. Its weakest year was 1981, at -51.3%.
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 BIO have grown?
Investing $100 at the end of every month since 1980-02 would have grown to about $2.25M on $55,900 invested.
Did BIO beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $67,816. BIO beat the S&P 500 by +102.2% 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
Bio-Rad Laboratories, Inc. Class A (BIO) historical total-return data from 1980-02 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.