What If You Invested $1,000 in Comcast (CMCSA)?
Enter any amount and start date. We use historical prices to show your hypothetical return.
Comcast
CMCSA
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
+103034.19% (1,031 times)
- Buy
- Mar 27, 1980
- $0.05
- Sell
- Sep 2, 2021
- $50.42
Buying CMCSA at the all-time low and selling at the peak would have turned $1,000 into $1,031,341.87.
Max drawdown
-67.88% (fell to 32% of peak)
- Peak
- Dec 23, 1999
- $11.26
- Trough
- Mar 9, 2009
- $3.62
The worst decline for CMCSA was -67.88% (fell to 32% of peak) from peak to trough.
IPO to current
+52307.07% (524.1 times)
- IPO
- Mar 17, 1980
- $0.06
- Current
- Mar 16, 2026
- $30.34
A $1,000 investment in CMCSA at IPO would be worth $524,070.67 today.
Dollar amounts based on selected investment ($1,000)
Frequently asked questions
What is Comcast (CMCSA) stock's all-time high and all-time low?
- Comcast (CMCSA) stock's all-time low was $0.05 on Mar 27, 1980. The all-time high was $50.42 on Sep 2, 2021.
What if you invested $1,000 in Comcast (CMCSA) stock at the all-time low?
- Buying Comcast (CMCSA) stock at the all-time low ($0.05 on Mar 27, 1980) and selling at the peak ($50.42 on Sep 2, 2021) would have turned $1,000 into $1,031,341.87. Historical return: +103034.19% (1,031 times).
What are Comcast (CMCSA)'s best buy and sell dates for maximum profit?
- The best buy date for Comcast (CMCSA) stock was Mar 27, 1980 (all-time low at $0.05). The best sell date was Sep 2, 2021 at $50.42. This investment would have returned +103034.19% (1,031 times).
What was Comcast (CMCSA) stock's maximum drawdown?
- Comcast (CMCSA) stock's worst decline was -67.88% (fell to 32% of peak) from peak to trough. Peak: $11.26 on Dec 23, 1999. Trough: $3.62 on Mar 9, 2009. A $1,000 investment at the peak would have been worth $321.17 at the trough.
What if you bought Comcast (CMCSA) stock at IPO?
- A $1,000 investment in Comcast (CMCSA) stock at IPO ($0.06 on Mar 17, 1980) would be worth $524,070.67 today. Historical return: +52307.07% (524.1 times). Current stock price: $30.34 as of Mar 16, 2026.
What if you invested $1,000 in Comcast (CMCSA) 5 years ago?
- A $1,000 investment in Comcast (CMCSA) stock 5 years ago ($46.97 on Mar 16, 2021) would be worth $645.91 today. Historical return: -35.41% (0.65 times). Current stock price: $30.34 as of Mar 16, 2026.
What if you invested $1,000 in Comcast (CMCSA) 10 years ago?
- A $1,000 investment in Comcast (CMCSA) stock 10 years ago ($22 on Mar 16, 2016) would be worth $1,379.17 today. Historical return: +37.92% (1.38 times). Current stock price: $30.34 as of Mar 16, 2026.
What if you invested $1,000 in Comcast (CMCSA) 20 years ago?
- A $1,000 investment in Comcast (CMCSA) stock 20 years ago ($5.76 on Mar 16, 2006) would be worth $5,267.69 today. Historical return: +426.77% (5.27 times). Current stock price: $30.34 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 CMCSA. You can select any date between our first and most recent data point.