What if you'd held RYTM?
A $1,000 investment in Rhythm Pharmaceuticals, Inc. (RYTM) at the month-end close of 2017-10 would be worth $4,524 at the close of 2026-08 — +352.4% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $2,993.
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 2017
| Year | Value of $1,000 | Year return |
|---|---|---|
| 2017 | $1,000 | — |
| 2018 | $925 | -7.5% |
| 2019 | $790 | -14.6% |
| 2020 | $1,023 | +29.5% |
| 2021 | $343 | -66.4% |
| 2022 | $1,002 | +191.8% |
| 2023 | $1,582 | +57.9% |
| 2024 | $1,926 | +21.8% |
| 2025 | $3,683 | +91.2% |
| 2026 | $3,982 | +8.1% |
Best and worst month-end to buy
The best single month-end close to have bought RYTM was 2022-05 ($3.44): $1,000 then is $33,642 today. The worst was 2026-08 ($116): $1,000 then is $1,000.
FAQ
What would $1,000 in RYTM be worth today?
A $1,000 investment in Rhythm Pharmaceuticals, Inc. (RYTM) at the start of 2017 would be worth about $4,524 today, a total return of +352.4%. Dividends are reinvested in these figures.
What were the best and worst years for RYTM?
Rhythm Pharmaceuticals, Inc. (RYTM)'s strongest calendar year since 2017 was 2022, a +191.8% return — $1,000 held through that year became about $2,918 by year-end. Its weakest year was 2021, at -66.4%.
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 RYTM have grown?
Investing $100 at the end of every month since 2017-10 would have grown to about $55,090 on $10,700 invested.
Did RYTM beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $2,993. RYTM beat the S&P 500 by +51.2% 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
Rhythm Pharmaceuticals, Inc. (RYTM) historical total-return data from 2017-10 to 2026-08, reduced to month-end closes for the tables above.
Returns use adjusted close prices from Yahoo Finance historical data — adjusted for stock splits and reinvested dividends — the same convention used by major brokerages. 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 (Yahoo Finance): 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 Yahoo Finance. As of 2026-08. Not financial advice.