Fox Business Flash top headlines for August 5 Check out what’s clicking on FoxBusiness.com. Chinese chipmakers' shares jumped by the most in two years this week as House of Representatives Speaker Nancy Pelosi's visit to Taiwan heightened tensions with the U.S., driving patriotic bets on a sector Beijing sees as key to its rivalry with Washington. The surge in interest in chipmaking stocks, which had lost more than a third of their value over the past year on valuation concerns, came after the U.S. Senate last week passed the "Chips and Science" Act to better compete with China. China's semiconductor...