This study discusses the impact of the COVID-19 on Taiwan's 50 electronic and financial stocks, rather than the impact of the entire financial system. This research focuses on whether the number of confirmed cases in Taiwan has an impact on the electronic and financial stocks? We found that the price of electronic and financial stocks in Taiwan decline due to the COVID-19 and the negative covariance. And the negative volatility of stock price has increased greatly due to COVID-19. The epidemic of COVID-19 did cause the stock prices of Taiwan's 50 electronics and financial stocks to fall, and the volatility of stock prices increased greatly.