[Key Pre-Market News for U.S. Stocks: Trump's Policies Advance Rapidly, AI Industry Chain Receives New Catalyst] BlockBeats reports that on July 21, the key pre-market news for U.S. stocks is as follows: 1. Trump is expected to impose new tariffs on dozens of countries as early as this week; 2. Trump has agreed to the ethical provisions of the CLARITY Act, which is nearing a Senate vote; 3. The 'hidden debt' of America's five major tech giants has surged to $1.65 trillion; 4. JPMorgan CEO: Investors are underestimating market risks and will not buy stocks or long-term U.S. bonds at this time; 5. Goldman Sachs: If the Strait of Hormuz remains blocked for an extended period, international oil prices could exceed $120 per barrel by the end of the year; 6. AI storage demand continues to grow: NVIDIA's CMX may consume over 100 million TBNAND next year, and Samsung has already begun supplying.