What if you'd held ASMB?
A $1,000 investment in Assembly Biosciences, Inc. (ASMB) at the month-end close of 2010-12 would be worth $92.15 at the close of 2026-09 — -90.8% total return, dividends reinvested. The same $1,000 in the S&P 500, dividends reinvested, would be worth $8,182.
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 2010
| Year | Value of $1,000 | Year return |
|---|---|---|
| 2010 | $1,000 | — |
| 2011 | $1,210 | +21.0% |
| 2012 | $326 | -73.0% |
| 2013 | $577 | +76.9% |
| 2014 | $237 | -58.8% |
| 2015 | $227 | -4.5% |
| 2016 | $367 | +61.8% |
| 2017 | $1,367 | +272.4% |
| 2018 | $683 | -50.0% |
| 2019 | $618 | -9.5% |
| 2020 | $183 | -70.4% |
| 2021 | $70.39 | -61.5% |
| 2022 | $39.27 | -44.2% |
| 2023 | $24.77 | -36.9% |
| 2024 | $39.73 | +60.4% |
| 2025 | $85.62 | +115.5% |
| 2026 | $92.15 | +7.6% |
Best and worst month-end to buy
The best single month-end close to have bought ASMB was 2023-11 ($8.40): $1,000 then is $4,357 today. The worst was 2011-04 ($1,029): $1,000 then is $35.57.
FAQ
What would $1,000 in ASMB be worth today?
A $1,000 investment in Assembly Biosciences, Inc. (ASMB) at the start of 2010 would be worth about $92.15 today, a total return of -90.8%. Dividends are reinvested in these figures.
What were the best and worst years for ASMB?
Assembly Biosciences, Inc. (ASMB)'s strongest calendar year since 2010 was 2017, a +272.4% return — $1,000 held through that year became about $3,724 by year-end. Its weakest year was 2012, at -73.0%.
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 ASMB have grown?
Investing $100 at the end of every month since 2010-12 would have grown to about $16,274 on $19,000 invested.
Did ASMB 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 $8,182. ASMB trailed the S&P 500 by +98.9% 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
Assembly Biosciences, Inc. (ASMB) historical total-return data from 2010-12 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.