Why Afterpay, Challenger, IVE Group, & Mesoblast shares are dropping lower

The S&P/ASX 200 Index (ASX: XJO) is on course to record another solid gain on Tuesday. At the time of writing the benchmark index is up 0.7% to 6,152.9 points.
Four shares that have failed to follow the market higher today are listed below. Here’s why they are dropping lower:
The Afterpay Ltd(ASX: APT) share price is down over 3% to $70.13. This decline may have been driven by one of its substantial shareholders selling down its stake. According to a notice, Lone Pine Capital sold around $…

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