Cap Guesser: a daily market cap game for people who follow stocks

Every round checked against a filing

After you lock in, the real number drops onto the ruler. Each answer is that day's closing price times the share count from the company's own SEC filing.

Read the answers to common questions

Puzzle #1Nov 5, 2026

Costco 1xDec 4, 2014. You $80B, actual $63B90
Tesla 2xOct 19, 2018. You $60B, actual $44.7B174
Nvidia 2xAug 28, 2020. You $210B, actual $324B162
Domino's 2xApr 1, 2014. You $9B, actual $4.37B138
AMD 3xMar 7, 2016. You $7B, actual $1.96B135

Total699/1000

Round 3 of 5Counts double

Nvidia

NVDAAug 28, 2020

Semiconductors, based in Santa Clara, California.

Actual

$10M$100M$1B$10B$100B$1T$10T

Actual: $324B
Your guess: $210B; 1.5x low
Points: 162; 81 x 2

Closed at $525.91 a share, with 617M shares outstanding as of Aug 14, 2020. Source: SEC 10-Q

How a round is scored, in 3 steps

1

Slide to your guess

The ruler runs from $10M to $10T. Drag it, or type a number like 88b.

$88B

$10M$1B$1T$10T

2

Lock in for the answer

Points follow how many times off you were. Guessing high or low costs the same.

Off by	Points
Exact	100
1.5x	82
2x	70
3x	52
10x or more	0

3

Score more on later rounds

Round 1 counts once, rounds 2 to 4 count double, and round 5 counts triple.

100R1
200R2
200R3
200R4
300R5

A perfect day1,000

No account to make. Your streak and history stay in the browser you play in.

Share an image of your day

One tap makes a 4:5 picture with your total and each round's points, sized for group chats.

Copy the text result

Five colored squares and your total, no spoilers.

Keep a daily streak

Your stats show games played, your average score and your best streak.

Come back at midnight

A new puzzle starts at midnight in your own time zone.

Questions

What players ask before their first round.

Where do the numbers come from?

The closing price that day times the shares outstanding in the company's nearest 10-Q or 10-K. The filing is linked after every round.

Why these dates?

They are random trading days, not big news days, so you judge the company and not the headline.

Do companies come back?

Yes, about every six weeks, and always on a date at least 18 months from the last one.

Which companies are in it?

About 200 that most people who follow stocks would know, from Apple to Chipotle.

Is it free?

Yes. There is no account, and nothing to download.

Cap Guesser, a daily market cap game