What if you'd held TLPH?
A $1,000 investment in Talphera, Inc. (TLPH) at the month-end close of 2011-02 would be worth $16.57 at the close of 2026-09 — -98.3% total return, dividends reinvested. The same $1,000 in the S&P 500, dividends reinvested, would be worth $7,727.
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 2011
| Year | Value of $1,000 | Year return |
|---|---|---|
| 2011 | $1,000 | — |
| 2012 | $2,219 | +121.9% |
| 2013 | $5,891 | +165.5% |
| 2014 | $3,505 | -40.5% |
| 2015 | $2,005 | -42.8% |
| 2016 | $1,354 | -32.5% |
| 2017 | $1,057 | -21.9% |
| 2018 | $1,203 | +13.8% |
| 2019 | $1,099 | -8.7% |
| 2020 | $646 | -41.2% |
| 2021 | $292 | -54.8% |
| 2022 | $58.85 | -79.8% |
| 2023 | $19.27 | -67.3% |
| 2024 | $13.54 | -29.7% |
| 2025 | $29.69 | +119.2% |
| 2026 | $31.25 | +5.3% |
Best and worst month-end to buy
The best single month-end close to have bought TLPH was 2025-07 ($0.42): $1,000 then is $2,857 today. The worst was 2014-03 ($240): $1,000 then is $5.00.
FAQ
What would $1,000 in TLPH be worth today?
A $1,000 investment in Talphera, Inc. (TLPH) at the start of 2011 would be worth about $16.57 today, a total return of -98.3%. Dividends are reinvested in these figures.
What were the best and worst years for TLPH?
Talphera, Inc. (TLPH)'s strongest calendar year since 2011 was 2013, a +165.5% return — $1,000 held through that year became about $2,655 by year-end. Its weakest year was 2022, at -79.8%.
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 TLPH have grown?
Investing $100 at the end of every month since 2011-02 would have grown to about $7,390 on $18,800 invested.
Did TLPH 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 $7,727. TLPH trailed the S&P 500 by +99.8% 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
Talphera, Inc. (TLPH) historical total-return data from 2011-02 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.