Why A2 Milk, Calix, CSL, and Ioneer shares are charging higher today

The S&P/ASX 200 Index (ASX: XJO) is having a mildly positive session on Tuesday. In afternoon trade, the benchmark index is up slightly to 8,822.7 points. Four ASX shares that are rising more than most today are listed below. Here’s why they are climbing: A2 Milk Company Ltd (ASX: A2M) The A2 Milk share price is up 3% to $6.97. Investors have been buying this infant formula company’s shares this week after it received approval from the State Administration for Market Regulation (SAMR) to transition two China label infant milk formula (IMF) product registrations. A2 Milk’s CEO, David Bortolussi, said:…