If you're still investing based on issues or luck, this is a must-read investment basics book.
An easy-to-read novel that covers the various situations and investment know-how you might encounter in the US stock market.

Professor Lee Ju-taek, who shares investment insights through his YouTube channel "Professor Ban's American Investment Story" every morning, has published his fourth new book through Winner's Book.
This book is a fictional story about a Korean-American man in his 30s who lost a lot of money through gambling.
As you read about the difficulties the protagonist faced while investing in American stocks and how he overcame life's challenges by communicating with YouTuber Professor Ban, you will naturally acquire investment know-how and economic knowledge.
This book is packed with tips for understanding the major trends of the stock market and applying them in real life, including beginner mistakes, how to deal with falling stock prices, the mindset for investing, and financial management techniques.
If you've been investing based on flashy trends or luck, it's time to learn the fundamentals of investing and the real way to avoid losing money by choosing stocks wisely.
Let's make the knowledge of Professor Lee Ju-taek, a master of American stocks, our own through easy-to-read novels and various fables.

Gambling wasn't just for places like Las Vegas.
There were countless things that tempted me just by going on the internet.
The stock market, also known as the stock market, was one of them.
After graduating and getting my first job in Miami, I traded in my 1989 Toyota Camry with 200,000 miles on it with my first paycheck and bought a Mercedes C-Class with a 60-month installment plan.
I had a lot of debt on several credit cards, and I wanted to try a nice relationship and drive a Benz.
In the end, that's how Car Poor's life began.
I started investing in US stocks, building on my experience of trading short-term for four years before coming to Korea to study abroad.
I thought that the quickest way to recover the approximately 200 million won I spent in the US, including the money I spent studying abroad and the debt I owed my parents, was through stocks.

--- p.17

As I sit on the beach like this now, looking out at the horizon, I feel like everything has come back to square one.
The positive thing is that I still have a job, I don't have much debt, and although I won't be returning to Korea in glory anytime soon, I'm still young and have plenty of time.
In “Portrait of Youth,” Lee Mun-yeol said that seagulls must continue to fly and people must continue to live.
Despair is not the end of life, but the beginning of new hope.
Although the past four years have been a waste, I've gained some experience and I'm determined to start again.
From the beginning again.
I am a person who does not stand still, but grows.
Failure makes me stronger and helps me grow.
I need to look back at myself again and figure out where and what I did wrong.

--- p.22

“Professor, what is investing?” was the first question I asked as soon as the professor finished his market briefing.
After singing the song 'Fly to the Moon', if you ask any questions, he will answer and explain well.
“Yes, Mr. Rainmaker, that’s a good question!” the professor replied with a smile.
“Investment” originally meant moving money to a bank to generate economic returns beyond the interest earned by saving money.
Anything that uses your current money to make more money, whether it's good or bad, can be considered an investment.
If you invest well, the pie of money you have will gradually grow, and you can achieve great wealth.
Becoming rich requires patient effort to grow this pie without shrinking it.
Some people invest safely in real estate, bonds, dollars, and gold, while others are a bit more risky, investing in businesses, stocks, and cryptocurrencies.
As of 2025, the inflation rate in the United States is around 2.8%, so if banks don't pay more than that, they will continue to lose money.
If I just hold on to my money, my pie will get smaller.
So, to beat inflation, you have to keep putting money into the pie in some way, you have to keep investing in some way to make the pie grow.
“Only then can you have a stable retirement and achieve your dream life goals.”
--- p.26

But what we need to be careful about here is that we should not think of stock investment as some new field.
You should not make the mistake of thinking that if you just buy any stock and hold it for a long time, the price will go up.
While buying a pre-IPO or newly listed company for the first time may be an investment, investing in stocks by buying stocks traded on the stock market to grow your pie is more akin to buying and selling apples.
Because we are receiving shares in a company that someone else has already bought by paying money.
You can buy it expensively or cheaply, so buying it cheaply will save you money and allow you to make more profit.
--- p.28

“Professor, if I just follow the flow, wouldn’t I be able to make a lot of money?” asked Seo Kyung-rak, a Jeonju native who has recently become obsessed with stocks.
“You could call that a momentum investing strategy.
It's a short-term swing strategy where you buy stocks with good momentum and hold them until the momentum fades.
It's called "burning" and you can make money by swinging the bat while holding it short, like moths to a flame, and flocking to hot stocks whose prices are rising.
However, if you are not careful and get bitten at the high point, you can live in pain for quite a long time, even for several years.
The forces that temporarily entered the market also leave, trading volume decreases, and even if the company is doing well, it becomes a stock that no one is interested in.
Also, you have to look at charts and stock prices every moment and buy and sell, so your life becomes exhausting like that of Wall Street traders with short life spans.
It would be good to buy long like hedge funds and short like hedge, but it is too difficult for beginners to do.
It's a little better if you plan to always buy 100% stock and 90% short, like a covered call, and only make 10% or lose 10%.
However, when greed becomes excessive, it is not often that the hungry are able to exercise restraint like this.
Most people want to make huge profits, from 100% to several hundred% more.”
--- p.115

It's also called the 3-day rule.
If the shepherd boy calls three times in three days, the news will go unanswered and will not affect the stock price.
This is because the stock market is efficient.
Mr. Market
The theory is that the market is very efficient, so if you believe in the efficient market moderately and semi-strongly, past facts and future good and bad news that we know will be reflected within 3 days.
The good and bad news that came out a week ago no longer have any impact on investors trading this stock.
Eventually, additional or unexpected news will have to come out to start influencing the stock price.
Therefore, information known only to company insiders is not yet reflected in the stock price, and affects the stock price as soon as it is released to the public.
However, leaking insider information is prohibited by law.” I realized how much I had wasted my time, moving like a moth to a flame, following good and bad news like a ghost wandering through the underworld, from one YouTube channel to another.
In the end, I remembered the professor's words that a moth only follows a famous feast and ends up dying.

--- p.116