What if you'd held GKOS?
A $1,000 investment in Glaukos Corporation (GKOS) at the month-end close of 2015-06 would be worth $5,296 at the close of 2026-09 — +429.6% total return, dividends reinvested. The same $1,000 in the S&P 500, dividends reinvested, would be worth $4,529.
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 2015
| Year | Value of $1,000 | Year return |
|---|---|---|
| 2015 | $1,000 | — |
| 2016 | $1,389 | +38.9% |
| 2017 | $1,039 | -25.2% |
| 2018 | $2,275 | +119.0% |
| 2019 | $2,206 | -3.0% |
| 2020 | $3,048 | +38.2% |
| 2021 | $1,800 | -41.0% |
| 2022 | $1,769 | -1.7% |
| 2023 | $3,220 | +82.0% |
| 2024 | $6,073 | +88.6% |
| 2025 | $4,573 | -24.7% |
| 2026 | $6,217 | +35.9% |
Best and worst month-end to buy
The best single month-end close to have bought GKOS was 2016-01 ($16.32): $1,000 then is $9,405 today. The worst was 2026-08 ($180): $1,000 then is $855.
FAQ
What would $1,000 in GKOS be worth today?
A $1,000 investment in Glaukos Corporation (GKOS) at the start of 2015 would be worth about $5,296 today, a total return of +429.6%. Dividends are reinvested in these figures.
What were the best and worst years for GKOS?
Glaukos Corporation (GKOS)'s strongest calendar year since 2015 was 2018, a +119.0% return — $1,000 held through that year became about $2,190 by year-end. Its weakest year was 2021, at -41.0%.
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 GKOS have grown?
Investing $100 at the end of every month since 2015-06 would have grown to about $41,912 on $13,600 invested.
Did GKOS 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 $4,529. GKOS beat the S&P 500 by +17.0% 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
Glaukos Corporation (GKOS) historical total-return data from 2015-06 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 2026-09-23. Not financial advice.