What If You Invested $1,000 in Costco (COST)?
Enter any amount and start date. We use historical prices to show your hypothetical return.
Costco
COST
Historical extremes
Maximum profit (buy at all-time low, sell at peak), maximum drawdown (peak to trough), and total return from IPO to current price.
Max profit
+26516.04% (266.2 times)
- Buy
- Dec 4, 1987
- $4.03
- Sell
- Feb 13, 2025
- $1,072.45
Buying COST at the all-time low and selling at the peak would have turned $1,000 into $266,160.43.
Max drawdown
-61.72% (fell to 38% of peak)
- Peak
- Aug 29, 1991
- $10.69
- Trough
- Jan 11, 1995
- $4.09
The worst decline for COST was -61.72% (fell to 38% of peak) from peak to trough.
IPO to current
+13531.22% (136.3 times)
- IPO
- Jul 9, 1986
- $7.35
- Current
- Mar 16, 2026
- $1,001.74
A $1,000 investment in COST at IPO would be worth $136,312.25 today.
Dollar amounts based on selected investment ($1,000)
Frequently asked questions
What is Costco (COST) stock's all-time high and all-time low?
- Costco (COST) stock's all-time low was $4.03 on Dec 4, 1987. The all-time high was $1,072.45 on Feb 13, 2025.
What if you invested $1,000 in Costco (COST) stock at the all-time low?
- Buying Costco (COST) stock at the all-time low ($4.03 on Dec 4, 1987) and selling at the peak ($1,072.45 on Feb 13, 2025) would have turned $1,000 into $266,160.43. Historical return: +26516.04% (266.2 times).
What are Costco (COST)'s best buy and sell dates for maximum profit?
- The best buy date for Costco (COST) stock was Dec 4, 1987 (all-time low at $4.03). The best sell date was Feb 13, 2025 at $1,072.45. This investment would have returned +26516.04% (266.2 times).
What was Costco (COST) stock's maximum drawdown?
- Costco (COST) stock's worst decline was -61.72% (fell to 38% of peak) from peak to trough. Peak: $10.69 on Aug 29, 1991. Trough: $4.09 on Jan 11, 1995. A $1,000 investment at the peak would have been worth $382.81 at the trough.
What if you bought Costco (COST) stock at IPO?
- A $1,000 investment in Costco (COST) stock at IPO ($7.35 on Jul 9, 1986) would be worth $136,312.25 today. Historical return: +13531.22% (136.3 times). Current stock price: $1,001.74 as of Mar 16, 2026.
What if you invested $1,000 in Costco (COST) 5 years ago?
- A $1,000 investment in Costco (COST) stock 5 years ago ($310.25 on Mar 16, 2021) would be worth $3,228.84 today. Historical return: +222.88% (3.23 times). Current stock price: $1,001.74 as of Mar 16, 2026.
What if you invested $1,000 in Costco (COST) 10 years ago?
- A $1,000 investment in Costco (COST) stock 10 years ago ($129.98 on Mar 16, 2016) would be worth $7,706.62 today. Historical return: +670.66% (7.71 times). Current stock price: $1,001.74 as of Mar 16, 2026.
What if you invested $1,000 in Costco (COST) 20 years ago?
- A $1,000 investment in Costco (COST) stock 20 years ago ($37.46 on Mar 16, 2006) would be worth $26,741.59 today. Historical return: +2574.16% (26.7 times). Current stock price: $1,001.74 as of Mar 16, 2026.
About this data
- How does the investment calculator work?
- Enter an investment amount and a start date. We use historical stock prices to calculate how many shares you would have bought, then apply the current price to show your hypothetical portfolio value and return.
- What are Historical extremes?
- Max profit: buy at all-time low, sell at the highest price after. Max drawdown: the largest peak-to-trough decline in price. IPO to current: total return from IPO date to the latest price.
- What is Max drawdown?
- Maximum drawdown is the largest peak-to-trough decline in price. It shows the worst drop from any prior high to a subsequent low. Peak and Trough are the dates and prices at which this decline occurred.
- Does this include dividends?
- The calculator uses adjusted closing prices when available, which account for stock splits and dividends. For the most accurate results, we recommend using data that includes dividend adjustments.
- Where does the price data come from?
- Historical prices are from Yahoo Finance, adjusted for stock splits and dividends. We use adjusted close for all calculations.
- How are the dollar amounts in the cards calculated?
- The dollar amounts in Historical extremes use the investment amount you select in the calculator above (e.g. $1,000). They show what your investment would have been worth at the Buy/Peak/IPO date versus the Sell/Trough/Current date.
- What date range can I use?
- The available date range depends on our historical price data for COST. You can select any date between our first and most recent data point.