Apple warns of iPhone shortages after China lockdown

"We are working closely with our supplier to return to normal production levels while ensuring the health and safety of every worker," Apple said in its statement. The shutdown is the second to affect Apple this year. It lost about $US4 billion ($6.2 billion) in sales of iPads and Macs over the spring and summer after factories outside of Shanghai were closed to limit the spread of COVID-19. Apple's setback comes amid a larger downturn in the prospects for the tech industry. Shares of Alphabet, Amazon and Meta have tumbled this year amid an economic slowdown that has caused e-commerce…