Fears about the health of the US economy has triggered widespread selling across North American, European and Asian markets overnight, with commodity prices tumbling.

Also today:

• The Australian Tax Office provides a surprise gift to taxpayers.
• Premiers begin to reopen their states, but fears remain about a second wave of COVID19 infections.
• And BHP runs into trouble at one of its biggest mines over plans to destroy areas of cultural heritage.

Plus, an interview with AFL legend and broadcaster David Schwarz about the outlook for the code.