Wall Street RegretsThe regret calculator.

What if you'd held LUNG?

A $1,000 investment in Pulmonx Corporation (LUNG) at the month-end close of 2020-10 would be worth $54.92 at the close of 2026-08 — -94.5% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $2,357.

$1,000 since 2020$54.92Total return-94.5%Multiple0.05×CAGR-39.2%

Your scenario

Dates resolve to the nearest month-end close.
Leave empty for "held until today".
Invested at each month-end. Starts on the buy date.

Result

Worth$54.92Gain+$-945 (-94.5%)Multiple0.1×CAGR-39.2%

    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.

    2020$54.922021$33.472022$72.032023$2742024$1812025$3402026$1,045

    Every year, $1,000 from 2020

    YearValue of $1,000Year return
    2020$1,000
    2021$465-53.5%
    2022$122-73.7%
    2023$185+51.2%
    2024$98.38-46.7%
    2025$32.02-67.5%
    2026$33.47+4.5%

    Best and worst month-end to buy

    The best single month-end close to have bought LUNG was 2026-04 ($1.28): $1,000 then is $1,805 today. The worst was 2020-12 ($69.02): $1,000 then is $33.47.

    FAQ

    What would $1,000 in LUNG be worth today?

    A $1,000 investment in Pulmonx Corporation (LUNG) at the start of 2020 would be worth about $54.92 today, a total return of -94.5%. Dividends are reinvested in these figures.

    What were the best and worst years for LUNG?

    Pulmonx Corporation (LUNG)'s strongest calendar year since 2020 was 2023, a +51.2% return — $1,000 held through that year became about $1,512 by year-end. Its weakest year was 2022, at -73.7%.

    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 LUNG have grown?

    Investing $100 at the end of every month since 2020-10 would have grown to about $3,163 on $7,100 invested.

    Did LUNG beat the S&P 500?

    Over the same period, $1,000 in the S&P 500 index would be worth $2,357. LUNG trailed the S&P 500 by +97.7% 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

    Pulmonx Corporation (LUNG) historical total-return data from 2020-10 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.

    Full methodology →

    What if you'd held…

    Data: adjusted close prices via Yahoo Finance. As of 2026-08. Not financial advice.