What if you'd held IOSP?
A $1,000 investment in Innospec Inc. (IOSP) at the month-end close of 1998-05 would be worth $11,717 at the close of 2026-08 — +1071.7% total return, dividends reinvested. The same $1,000 in the S&P 500, dividends reinvested, would be worth $11,719.
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 1998
| Year | Value of $1,000 | Year return |
|---|---|---|
| 1998 | $1,000 | — |
| 1999 | $747 | -25.3% |
| 2000 | $828 | +10.9% |
| 2001 | $1,297 | +56.6% |
| 2002 | $1,141 | -12.1% |
| 2003 | $1,427 | +25.0% |
| 2004 | $1,515 | +6.2% |
| 2005 | $1,195 | -21.1% |
| 2006 | $3,429 | +186.9% |
| 2007 | $2,537 | -26.0% |
| 2008 | $876 | -65.4% |
| 2009 | $1,523 | +73.8% |
| 2010 | $3,081 | +102.3% |
| 2011 | $4,239 | +37.6% |
| 2012 | $5,552 | +31.0% |
| 2013 | $7,521 | +35.5% |
| 2014 | $7,039 | -6.4% |
| 2015 | $9,062 | +28.7% |
| 2016 | $11,573 | +27.7% |
| 2017 | $12,071 | +4.3% |
| 2018 | $10,685 | -11.5% |
| 2019 | $18,104 | +69.4% |
| 2020 | $16,112 | -11.0% |
| 2021 | $16,236 | +0.8% |
| 2022 | $18,710 | +15.2% |
| 2023 | $22,726 | +21.5% |
| 2024 | $20,552 | -9.6% |
| 2025 | $14,604 | -28.9% |
| 2026 | $18,413 | +26.1% |
Best and worst month-end to buy
The best single month-end close to have bought IOSP was 2000-06 ($2.92): $1,000 then is $32,664 today. The worst was 2024-07 ($126): $1,000 then is $757.
FAQ
What would $1,000 in IOSP be worth today?
A $1,000 investment in Innospec Inc. (IOSP) at the start of 1998 would be worth about $11,717 today, a total return of +1071.7%. Dividends are reinvested in these figures.
What were the best and worst years for IOSP?
Innospec Inc. (IOSP)'s strongest calendar year since 1998 was 2006, a +186.9% return — $1,000 held through that year became about $2,869 by year-end. Its weakest year was 2008, at -65.4%.
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 IOSP have grown?
Investing $100 at the end of every month since 1998-05 would have grown to about $250,309 on $34,000 invested.
Did IOSP 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 $11,719. IOSP trailed the S&P 500 by +0.0% 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
Innospec Inc. (IOSP) historical total-return data from 1998-05 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.