$1,000 in Costco Wholesale Corporation in 2016 → $6,179 today
If you'd invested $1,000 in Costco Wholesale Corporation (COST) in 2016, buying at the December 2016 month-end close of $160 (the first in this price history), and held to the latest close on 2026-10-16, you'd have $6,179. That's a +517.9% price return. Through September 2026, the latest month the fund has reported, the same $1,000 became $5,689 in COST and $3,999 in an S&P 500 index fund (TSP C Fund). The fund figure includes reinvested dividends; the stock figure does not, so the comparison favors the fund.
Nearby years: 2017 · 2018 · 2019 · 2020 all years →
FAQ
How much is $1,000 invested in COST in 2016 worth today?
$6,179 at the latest close (2026-10-16), a price return of +517.9%.
Did $1,000 in COST in 2016 beat the market?
Yes. From the December 2016 month-end through September 2026, COST beat an S&P 500 index fund by 42.2%: the fund (the TSP C Fund, dividends included) turned the same $1,000 into $3,999, and COST (price only) turned it into $5,689.
What does "month-end close" mean for this calculation?
It is a month's last price on IEX: the last regular-session trade on the month's final trading day. Here the buy is the December 2016 close and the position is valued at the latest close (2026-10-16).
Is the 2016–2026 return in COST typical?
No single year is typical. COST's best calendar year since 2016 was 2021, at +50.7%, and its worst was 2022, at -19.6%.
Methodology
The figures use COST's price data from December 2016 through 2026-10-16.
The entry price is the December 2016 month-end close and the exit is the latest close, both from IEX Historical Data. Price return: adjusted for stock splits, dividends not included. The market comparison uses the TSP C Fund's monthly returns, published at tsp.gov.
Buying at a month-end close misses the highs and lows inside the month, and the figures ignore taxes and fees. To try another amount, month or monthly contribution, use the COST calculator, which also shows the best and worst entry points in your window.
Compute your own COST scenario
Prices as of the last IEX trade on 2026-10-16. Data delayed end-of-day.