$SIA (C6L.SG)$ Just discussing, where is the logic of selling today on the ex-dividend date tomorrow?

$SIA (C6L.SG)$ Singapore Airlines is worth holding for the long term. The current pricing is relatively low, so it should be normal for it to be around 8-9 dollars. The new exchange also has it priced at over 9 dollars, and pre-COVID Singapore Airlines was too high.