ASX 200 rises, NIB plummets, Sonic drops on Monday 23 August 2021

The S&P/ASX 200 Index (ASX: XJO) finished the day higher by 0.4% to 7,490 points.

Here are some of the highlights from the ASX:

NIB Holdings Limited (ASX: NHF)

The NIB share price fell around 11% after the private health insurance business reported its