What if you'd held KOP?
A $1,000 investment in Koppers Holdings Inc. (KOP) at the month-end close of 2006-02 would be worth $3,386 at the close of 2026-09 — +238.6% total return, dividends reinvested. The same $1,000 in the S&P 500, dividends reinvested, would be worth $8,902.
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 2026-09, dividends included.
Every year, $1,000 from 2006
| Year | Value of $1,000 | Year return |
|---|---|---|
| 2006 | $1,000 | — |
| 2007 | $1,695 | +69.5% |
| 2008 | $871 | -48.6% |
| 2009 | $1,274 | +46.3% |
| 2010 | $1,546 | +21.3% |
| 2011 | $1,521 | -1.6% |
| 2012 | $1,736 | +14.1% |
| 2013 | $2,132 | +22.8% |
| 2014 | $1,245 | -41.6% |
| 2015 | $875 | -29.8% |
| 2016 | $1,932 | +120.9% |
| 2017 | $2,440 | +26.3% |
| 2018 | $817 | -66.5% |
| 2019 | $1,832 | +124.3% |
| 2020 | $1,494 | -18.5% |
| 2021 | $1,500 | +0.4% |
| 2022 | $1,362 | -9.2% |
| 2023 | $2,490 | +82.8% |
| 2024 | $1,585 | -36.3% |
| 2025 | $1,339 | -15.5% |
| 2026 | $2,378 | +77.6% |
Best and worst month-end to buy
The best single month-end close to have bought KOP was 2009-02 ($10.95): $1,000 then is $4,363 today. The worst was 2024-02 ($55.29): $1,000 then is $864.
FAQ
What would $1,000 in KOP be worth today?
A $1,000 investment in Koppers Holdings Inc. (KOP) at the start of 2006 would be worth about $3,386 today, a total return of +238.6%. Dividends are reinvested in these figures.
What were the best and worst years for KOP?
Koppers Holdings Inc. (KOP)'s strongest calendar year since 2006 was 2019, a +124.3% return — $1,000 held through that year became about $2,243 by year-end. Its weakest year was 2018, at -66.5%.
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 KOP have grown?
Investing $100 at the end of every month since 2006-02 would have grown to about $43,904 on $24,800 invested.
Did KOP 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 $8,902. KOP trailed the S&P 500 by +62.0% 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
Koppers Holdings Inc. (KOP) historical total-return data from 2006-02 to 2026-09, 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 2026-09-04. Not financial advice.