Want to get this in your inbox at lunchtime every weekday? Financial Review subscribers can sign up for The Brief newsletter here. Plus start your day with our Before the Bell newsletter and read a full wrap of the day’s news in Market Wrap.

In today’s news, Australian shares plunge further as tariffs churn markets, hackers attack big superannuation funds, and Joe Aston details how ASX Ltd opened the door to the great James Hardie heist.