What if you'd held CERS?
A $1,000 investment in Cerus Corporation (CERS) at the month-end close of 1997-01 would be worth $219 at the close of 2026-08 — -78.1% total return, dividends reinvested. The same $1,000 in the S&P 500, dividends reinvested, would be worth $16,639.
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 1997
| Year | Value of $1,000 | Year return |
|---|---|---|
| 1997 | $1,000 | — |
| 1998 | $955 | -4.5% |
| 1999 | $1,205 | +26.2% |
| 2000 | $3,420 | +184.0% |
| 2001 | $2,080 | -39.2% |
| 2002 | $977 | -53.0% |
| 2003 | $206 | -78.9% |
| 2004 | $134 | -35.0% |
| 2005 | $461 | +244.1% |
| 2006 | $266 | -42.3% |
| 2007 | $296 | +11.1% |
| 2008 | $31.82 | -89.2% |
| 2009 | $90.45 | +184.3% |
| 2010 | $112 | +23.6% |
| 2011 | $127 | +13.8% |
| 2012 | $144 | +12.9% |
| 2013 | $293 | +104.1% |
| 2014 | $284 | -3.3% |
| 2015 | $287 | +1.3% |
| 2016 | $198 | -31.2% |
| 2017 | $154 | -22.3% |
| 2018 | $230 | +50.0% |
| 2019 | $192 | -16.8% |
| 2020 | $315 | +64.0% |
| 2021 | $310 | -1.6% |
| 2022 | $166 | -46.4% |
| 2023 | $98.18 | -40.8% |
| 2024 | $70.00 | -28.7% |
| 2025 | $93.64 | +33.8% |
| 2026 | $120 | +28.6% |
Best and worst month-end to buy
The best single month-end close to have bought CERS was 2009-03 ($0.68): $1,000 then is $3,897 today. The worst was 2000-12 ($75.25): $1,000 then is $35.22.
FAQ
What would $1,000 in CERS be worth today?
A $1,000 investment in Cerus Corporation (CERS) at the start of 1997 would be worth about $219 today, a total return of -78.1%. Dividends are reinvested in these figures.
What were the best and worst years for CERS?
Cerus Corporation (CERS)'s strongest calendar year since 1997 was 2005, a +244.1% return — $1,000 held through that year became about $3,441 by year-end. Its weakest year was 2008, at -89.2%.
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 CERS have grown?
Investing $100 at the end of every month since 1997-01 would have grown to about $23,827 on $35,600 invested.
Did CERS beat the S&P 500?
Over the same period, $1,000 in the S&P 500 with dividends reinvested (the S&P 500 Total Return index) would be worth $16,639. CERS trailed the S&P 500 by +98.7% 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
Cerus Corporation (CERS) historical total-return data from 1997-01 to 2026-08, reduced to month-end closes for the tables above.
Returns use adjusted close prices — adjusted for stock splits and reinvested dividends, the same convention used by major brokerages. End-of-day and live prices come from EODHD; parts of the deep historical series are carried over from Yahoo Finance data. 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 (EODHD): 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 EODHD and Yahoo Finance. As of 2026-08. Not financial advice.