Group 1 - The U.S. stock market operates under a T+0 trading system, allowing investors to sell stocks on the same day they are purchased, which enhances trading flexibility [1] - Most U.S. stocks do not have price limits, leading to potentially significant price fluctuations within a single day, which increases both investment opportunities and risks [1] - The settlement system in the U.S. is T+2, meaning that the actual transfer of funds and stocks occurs on the second business day after a trade, necessitating careful management of available funds and stocks [1] Group 2 - Understanding a target company's financial health is crucial for investment decisions, focusing on key financial metrics such as revenue, profit, and balance sheet indicators [1] - The company's market position, including market share and competitive advantages, significantly impacts its long-term stock performance [1] - The capability of the management team and their strategic planning are vital, as effective leadership can provide a competitive edge in the market [1] Group 3 - Macroeconomic factors, such as GDP growth rate, unemployment rate, and inflation rate, have a profound impact on the overall stock market trends [2] - High GDP growth and low unemployment typically indicate economic prosperity, which may lead to rising stock prices, while high inflation can pressure the stock market due to potential interest rate hikes [2] - U.S. monetary and fiscal policies, including Federal Reserve interest rate decisions and tax policy adjustments, significantly influence market liquidity and corporate financing costs [2] Group 4 - Market valuation is a key consideration for investors, with common metrics including Price-to-Earnings (PE) and Price-to-Book (PB) ratios [2] - Overvaluation may indicate bubble risks and increased likelihood of market corrections, while undervaluation could present investment opportunities, albeit with caution regarding other adverse factors [2] Group 5 - Currency exchange rate fluctuations pose risks for investors in U.S. stocks, as changes in the value of the investor's home currency against the U.S. dollar can directly affect investment returns [3] - An appreciation of the home currency reduces the amount of local currency needed to exchange for the same amount of dollars, potentially decreasing returns when converted back [3] - Conversely, depreciation of the home currency increases returns when converted back to local currency [3]