What does NVIDIA do? It started with gaming graphics cards and has now become the core engine driving the AI revolution. Its business spans data centers, professional applications, and automotive sectors, and through the CUDA software ecosystem and strategic investments, it has built a complete landscape from chips to AI solutions.

Understand 'sell to open' and 'sell to close' in options trading in one article. Sell to open establishes a new short position to collect premium, while sell to close liquidates an existing long position to lock in gains or losses. This article uses examples to dissect core differences in trading purpose, cash flow, and risk-reward to help you make precise decisions.

An in-depth unveiling of Nancy Pelosi's investment portfolio, analyzing how she achieved a staggering 65% return in 2023 by heavily investing in tech stocks like NVIDIA and leveraging options. This article dissects her precise timing strategy, core holdings, and potential controversies, offering insights for investors.

This article explains the differences between SPX and SPY, including their definitions, trading methods, option mechanisms, fees, taxes, and target users, helping you understand which one is more suitable for investment.

When to sell stocks? Sell when the company's fundamentals deteriorate, the stock price breaks key technical levels, or it hits your preset profit-taking or stop-loss targets. This article analyzes these three core signals, providing actionable rules based on performance, trend lines, and drawdown ratios to help you build a disciplined selling system and avoid emotional decisions.

Why shouldn't you short sell lightly? Because short selling has limited profits but unlimited risks, completely opposite to going long with limited losses. You not only have to fight against market irrationality and high holding costs, but you're also betting against group mania and your own weaknesses. This is essentially a gamble with extremely low odds, betting your fortune on human nature.

Can green card holders vote? The answer is no. According to U.S. federal law, only citizens have the right to vote in federal and most state and local elections. Illegal voting may result in revocation of the green card or even deportation. The only legal way to obtain voting rights is through naturalization to become a U.S. citizen.

Under Trump's tariff war, the US may have to pay an economic price of up to $20 trillion for it. So, who will pay for this huge loss?

Global markets have been in violent turmoil recently due to tariff clouds, changes in economic policies, and macroeconomic expectations.