Reborn in America, I'm serious about making money.

"Oh no, someone jumped off a building!"

At Central Plaza, someone screamed as someone jumped from an upper floor. The fall was horrific and gruesome. The screams drew a large crowd, and patrolling police officers quickly arrived, calling for backup and an ambulance.

Although Central Plaza is called a plaza, it is not very large. Land in Hong Kong is extremely valuable, so it is impossible to have a large plaza. It quickly became crowded.

It was difficult for the white car to get through; in the end, the police had to clear the way for them to get in. But... everyone knew that the unlucky guy was finished, beyond saving.

In less than half an hour, news of someone jumping off a building in Central Plaza spread. It turned out that the person was a trader from a well-known securities company in Hong Kong who had embezzled a large amount of clients' funds to trade stock index futures. As a result, he suffered a margin call and couldn't cover the losses, so he had no choice but to jump.

The two tense hours before the market closed not only terrified Hong Kong investors, but also the fund companies and investment banks. They had never seen such a move before; it was too ruthless and something no human could do. At its worst, the price dropped by 10%, which terrified everyone, who thought a stock market crash was imminent.

Whether a stock market crash will happen or not is unknown, but it's true that many people have been wiped out, otherwise no one would have jumped ship.

Zhang San never expected that quantitative trading would eventually spiral out of control. He had only set the target at 5%, but an uncontrollable problem likely arose during the mechanical operation. It was probably a bug in the mathematical model that caused the entire trading to go awry.

At 10%, the computer began to buy large amounts of Hang Seng Index futures contracts.

Then, they reversed course and started buying rapidly until the market closed, pulling the index back to its original position and filling the gap.

After the stock market crash, investors gathered together, discussing the sudden turn of events with heavy hearts. They looked utterly dejected and unlucky.

An experienced stock investor spoke first: "This sharp drop was truly unexpected! My stocks plummeted, but thankfully, they recovered in the end."

Another young man chimed in, "Me too. I was hoping to make some money in the stock market, but now I'm terrified."

"What's going on? Why did it suddenly plummet?" someone asked.

"This is the first time something like this has ever happened. I've been trading stocks for so many years, and this is the first time I've encountered this," an expert analyzed.

"What will happen next? Should we sell and leave the market, or continue to hold?" This is the question everyone is most concerned about.

Some people say, "I think it depends on the situation. If you don't need the money, then wait and see."

Some people also argued, "I think we should get rid of it as soon as possible."

Everyone was discussing the matter animatedly, with differing opinions. However, amidst the noise, some people remained calm.

"The stock market is bound to go up and down. We can't let short-term fluctuations affect our judgment. The key is to manage risk well and not put all your eggs in one basket," said an experienced stock investor.

Fortunately, the price recovered in the end. Zhang San was also shocked by his own actions. He made a billion yuan in this round, but he didn't short sell. He didn't dare to, for fear of being discovered.

The next day, a newspaper headline read: "A Probing Needle or a Deadly Soul-Chasing Needle?"

Yesterday, I was shocked to hear that the stock market crashed in just two hours, plummeting by 10%. It was truly earth-shattering and terrifying; some people went bankrupt as a result, some jumped off buildings, and some lost their families.

I inquired with various securities companies and learned that this was not the work of a single company. Accounts held by various companies were involved in the transactions, which led to the situation at the time. Therefore, this transaction can be described as a spur-of-the-moment decision, since there were no actual transactions in the end, and it would have been very easy to drive up the price.

This should just be an isolated incident, a mistake.

……

After such an article was published, it attracted widespread attention. Indeed, the coincidence of this event was too great. Many people suffered heavy losses, which triggered a chain reaction of problems, causing the stock market to drop by 10%, which is regrettable.

Especially the one who jumped off the building, it's just... such a pity...

Some newspapers also claimed that yesterday's "bottom-testing needle" was a false alarm, and that some people must have been spreading rumors and causing this to happen.

Many people accept the explanation of the "fat finger" error; otherwise, why would the stock price suddenly surge at the end of the trading day?

Yesterday's erroneous trading incident caused considerable volatility in the stock market, leaving investors uneasy. The following day, the market opened with a slight upward trend.

On the trading floor, major indices rose across the board, with green numbers constantly fluctuating, indicating a gradually increasing market activity. Investors closely watched the charts on their screens, hoping this upward trend would continue.

Inside the trading hall, people's expressions gradually relaxed, and their initial tension was replaced by a glimmer of hope. Investors began whispering among themselves, discussing the reasons for the recent price surge and its possible future developments.

Some believe the erroneous order was merely an accidental mistake, that the market has already absorbed its impact, and that the upward trend signals a market recovery; others remain cautious, fearing it is just a temporary rebound.

In this market atmosphere, investors made their own decisions. Some chose to sell at higher prices to lock in profits; others seized opportunities and bought decisively, hoping to gain even more returns. Trading volume gradually increased, and market activity further improved.

Yesterday, the only overseas fund that was set to buy made money; they used a strategy of placing orders at low prices in advance, placing orders at various price levels below, so that when they sold and traded against each other, they could take over the positions. It was this operation that allowed all of their orders at low prices to be filled, and in a short time, they could be said to have made a profit of three percent.

The others were startled by the dense trading activity and immediately stopped trading. They needed to ask their superiors for instructions on how to proceed or whether to remain inactive.

They had never experienced anything like this before. This wasn't a erroneous order; it was a massive short-selling attack by someone, and it took at least hundreds or thousands of people fleeing en masse to create this kind of momentum.

On the other side, Zhang San and several engineers and mathematicians looked at each other, unsure of what to say. They stared at each other blankly, unsure how to explain. This time, a parameter they had set had malfunctioned. Unexpectedly, when the trading volume increased, it triggered a mechanism that caused a bug. Fortunately, they managed to stop it in time and started operating in the opposite direction.

Otherwise, they could drive the Hang Seng Index down to a terrifying level, and then a real stock market crash would occur.