Covid-related factory shutdowns and weakening demand for 5G handsets in China are likely to pressure near-term sales for U.S. companies that make chips for Chinese smartphones, a Wall Street firm says. The news is another negative for semiconductor stocks. X In a note to clients Monday, Mizuho Securities analyst Vijay Rakesh highlighted multiple headwinds for Chinese handset makers and their component suppliers in the second quarter. The major Chinese smartphone makers include Xiaomi, Oppo and Vivo. Together those three firms accounted for 33.4% of global smartphone shipments in 2021, research firm IDC says. The headwinds in China include weaker 5G...