Rules and price formula

What this is

A play stock market where Korean ramyeon, snacks, drinks and ice cream are the stocks, and you trade them with free points.

It borrows the look of a real exchange, but no money changes hands. Points are free, and you can't buy them or cash them out.

The more people buy a product, the higher its price. So the ranking shows the taste of the people playing here.

Prices are demand inside this game only. They say nothing about taste, quality, sales or any company's real share price.

Basic rules

You get 10,000 points on your first visit, and 1,000 more each time you come back after midnight Korea time.

Trade 1 to 500 shares at a time, up to 100 trades a day.

No sign-up, no login. One key in this browser opens your account. Lose the key and the account can't be recovered.

How prices work

Price depends only on shares held: price = 100 × e^(shares held ÷ 1,000).

A stock nobody holds starts at 100 points. When people hold 1,000 shares, it's about 2.72 times that.

Buying several shares costs the sum of each step up the curve. Selling walks back down the same curve.

Each trade burns 1% of its value as a fee. Nobody gets it. Buy and sell right away and you lose the fee.

Daily limit: 30% above or below the open. The open is the price just before the day's first trade, Korea time. Orders fill only up to the limit.

What you pay rounds up and what you receive rounds down, so rounding can't create points.

We picked these numbers from 40+ simulation runs. At these values, pumping one stock with several devices and dumping on your main account ends in a loss.

How rankings work

Account value = your points + what you'd get selling all your shares alone right now. Not price × shares.

Price × shares would let anyone inflate their value by buying up a thin stock alone.

This month's return starts from your value on your first visit of the month. Daily points you get later are added to that base.

All-time return favors early arrivals, so there's a separate table for people new this month.

Product popularity is ranked by total shares people hold. It isn't sales and it isn't a taste review.

Listing and takedowns

We picked the default products from the processed-food database of Korea's Ministry of Food and Drug Safety. Names are copied exactly as that database spells them.

We chose long-selling flagship products. The picks are our editing. A product whose name isn't in the database wasn't listed by us.

You can list up to 3 products a day, with the product name and the maker.

3 reports from different traders hide a stock automatically, and holders are bought out at the curve price, no fee.

If a maker asks, we take down one product or all of theirs right away. Email ok981121@naver.com. Holders are bought out the same way.

What we block and what we can't

New accounts per connection per day are capped, and there's a short gap between trades.

We can't fully stop someone making accounts on several devices. The daily limit shrinks how far one person can swing a price.

User listings filter out put-down words, alcohol, tobacco and people's names. The list can't catch everything, so reports and email cover the rest.

No logos, product photos or packaging art. The round badge next to each stock is the first letter of its name, drawn by us.