On the plane of Yan Yun's family to Guangzhou.

Lu Bingran asked Yan Yun: "You came back to attend your classmate's wedding this time, why didn't you bring your boyfriend home to sit?"

"I'm not free~ Mom, what do you mean, how much do you want to splash me out quickly?" Yan Yun complained with a whole face that her mother didn't want her so early.

"I asked you to bring someone home to sit down, and I didn't let you call someone to come to the door to propose, what kind of water is this splashing?" Lu Bingran looked like Yan Yun was thinking too much.

"Then will you raise me for the rest of my life?" Yan Yun was coquettish while sticking out his tongue.

"I don't seem to have such hobbies, I think it's good to have a good person, or if you ask your dad, he might be more happy. Lu Bingran directly kicked away Yan Yun's "ball" that was about to stick up.

"How are you two doing now?" asked his daughter.

"What else, of course it's too good to be better~" Yan Yun replied with a hippie smile.

"You have to be careful yourself. "Dad's words, it's time to stop.

"What's the point, tell me first, when are you going to take your boyfriend to meet your parents?" Lu Bingran was more concerned about this issue.

"There's no need to bring it, he'll deliver it himself. Yan Yun replied to his mother.

"Yes, why haven't I seen anyone come to the door in the past two days?" Yan Yun's mother felt that her daughter's self-confidence was a little bursting now, but she was still happy to see such a daughter.

"Isn't it time yet, don't worry, it will be there soon. Yan Yun continued to speak in a coquettish tone.

"One of you is in the United States and the other is in Melbourne, how can you be fast?" Yan Dabang has always stood on his wife's side.

"My parents' businesses are all over the world, and I have more doors in my house, so I can go to any door. Yan Yun deliberately exaggerated.

"Where did the world come from?" Yan Dabang is a rigorous person who is engaged in technology.

"Across the northern and southern hemispheres, isn't it called the whole world?" Yan Yun asked his father.

"Qi is also going to Melbourne?" or Yan's mother reacted first.

"Well, he's coming to my graduation ceremony, and when the time comes, you remember to interrogate me strictly, don't give me face. Yan Yun suddenly talked to his parents with a serious expression about "serious things".

"Is he going to Melbourne, then we will see your uncle and aunt together. "Lu Bingran didn't want to see Qi for the first time.

"My cousin must have gossiped with my uncle. When we came back from Melbourne, we met Qi Yi at the airport. "Yan Yun hasn't told his parents before, and someone in the Yan family has already seen Qi Yi.

…………………………

On the plane back to the United States, Qi also began to write letters to Yan Yun.

Yan who loves learning:

For Wall Street, Kuanke can no longer be regarded as "little fresh meat".

The first Kuanke on Wall Street began in the early sixties of the last century.

There was a math genius named Edard Thorp, who loved to gamble.

He holds a Ph.D. in Physics from UCLA and a professor at MIT (Massachusetts Institute of Technology).

In January 1961, he submitted a mathematical paper on gambling strategies to the American Mathematical Society:

Fortune's Formula: A inning Strategy for BlackJack.

The paper, which was reprinted by an Associated Press reporter, made Edard Thorp an overnight celebrity.

Through pure mathematical methods, he found the password to play 21 in the casino.

His 1962 book on demystifying casino codes became a regular on the New York Times bestseller list.

But casinos have always been open to make money, and Edard Thorp has become a key target for many casinos.

In the end, even if he put on makeup and went into the casino, he would be found out and drugged.

In desperation, Edard Thorp chose the larger "casino" Wall Street.

Since then, Wall Street has slowly begun to become the domain of mathematicians.

Wall Street has a lot of famous Kuanke, mathematicians Benoit Mandelbort, Paul ilmott, playing card experts Boaz einstein and Aaron Bron, hedge fund gods Jim Simons, Peter Muller, Ken Griffin, and each of them has a very legendary story, especially the last three.

By 2007, the Quant had joined forces to create a hedge fund with a market size of more than $2 trillion.

Kuanke does not ask about the laws of the economy, but only looks for the true meaning of mathematics in big data.

From the eighties and nineties of the last century until 2007, Kuakers single-handedly created a new wealth myth on Wall Street.

At that time, Ben Bernanke, chairman of the Federal Reserve, also delivered a keynote speech called "The Great Moderation".

He feels that the purely mathematical and computer methods used by the Kuakers have eliminated the volatility of the market and allowed the financial markets to mature.

But in fact, it was Kuanke who caused the biggest, fastest, and most bizarre financial collapse in history – the subprime mortgage crisis that began in August '07 and continues to this day.

The current financial crisis is the world's largest since the Great Depression.

In fact, whether it is a wide customer or a poker master, they are all looking for rules and calculating probabilities.

The probability of a stock, the probability of a table, fundamentally, is not much different.

But the financial environment itself is constantly evolving.

Therefore, many laws are only temporary, fleeting, and only laws that have not been discovered by others can be transformed into wealth.

Some people are lucky, in the economic big data, one step ahead of others to find the law that others can't find, but most of the Kuanke, that is, to do some quantitative analysis of quantitative models.

Only a handful of people can turn complex mathematical formulas and supercomputers into the rules of success on Wall Street.

For Kuak, this is no longer the best time, because it is difficult to predict Wall Street after the subprime mortgage crisis with pure mathematical formulas.

Those simple rules have been identified, and the market has long been in place to deal with them.

Only a very small number of people can find and expose those complex laws from the complex superficial phenomena.

In fact, Wall Street, in the final analysis, is a big casino, which makes money with economic laws, such as Warren Buffett, whose investment philosophy is based on his understanding of the industry. He focuses on what a company produces, what the quality is, and what the prospects are.

There are also people like Kuanke, who do not pay attention to why a company's stock price fluctuates at all, and only pay attention to the complex numerical variables behind the fluctuation data.

In short, Kuanke is a job that constantly uses mathematical formulas and computers to calculate probabilities.

It's strange, I think it's funny when you write about fashion, why do I feel bored the more I write?

I'd like to write about how Edard Thorp calculates the odds of winning at 21, but if I told you that I studied all his papers carefully, would you think I'm a gambler?

This time I went back to sort out the previous letters, and I found that the letters you wrote to me are always interesting, and the letters I wrote to you seem to be a record of daily life.

What to do, I don't seem to be a good storyteller.

Anyway, all you need to know is that your boyfriend is a miner on Flower Street.

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