What if you'd held AMPH?
A $1,000 investment in Amphastar Pharmaceuticals, Inc. (AMPH) at the month-end close of 2014-06 would be worth $2,316 at the close of 2026-09 — +131.6% total return, dividends reinvested. The same $1,000 in the S&P 500, dividends reinvested, would be worth $4,870.
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 2014
| Year | Value of $1,000 | Year return |
|---|---|---|
| 2014 | $1,000 | — |
| 2015 | $1,226 | +22.6% |
| 2016 | $1,587 | +29.4% |
| 2017 | $1,657 | +4.5% |
| 2018 | $1,714 | +3.4% |
| 2019 | $1,661 | -3.1% |
| 2020 | $1,732 | +4.3% |
| 2021 | $2,006 | +15.8% |
| 2022 | $2,413 | +20.3% |
| 2023 | $5,327 | +120.7% |
| 2024 | $3,198 | -40.0% |
| 2025 | $2,307 | -27.9% |
| 2026 | $1,997 | -13.4% |
Best and worst month-end to buy
The best single month-end close to have bought AMPH was 2014-07 ($8.88): $1,000 then is $2,610 today. The worst was 2023-12 ($61.85): $1,000 then is $375.
FAQ
What would $1,000 in AMPH be worth today?
A $1,000 investment in Amphastar Pharmaceuticals, Inc. (AMPH) at the start of 2014 would be worth about $2,316 today, a total return of +131.6%. Dividends are reinvested in these figures.
What were the best and worst years for AMPH?
Amphastar Pharmaceuticals, Inc. (AMPH)'s strongest calendar year since 2014 was 2023, a +120.7% return — $1,000 held through that year became about $2,207 by year-end. Its weakest year was 2024, at -40.0%.
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 AMPH have grown?
Investing $100 at the end of every month since 2014-06 would have grown to about $17,022 on $14,800 invested.
Did AMPH 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 $4,870. AMPH trailed the S&P 500 by +52.4% 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
Amphastar Pharmaceuticals, Inc. (AMPH) historical total-return data from 2014-06 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.