I must be an idiot. Someone educate me please. Why is Nevis in the market?

This is a 3yo Group 1. It's best run so far - a win in a 3yo class 6 at Randwick, with LESS - note that, LESS - weight than it will carry tomorrow.

So it goes from winning a 3yo class 6 to a group 1, goes up in weight, (and BTW gets beaten 5.5 lengths by the main chances in the meantime) and ends up $5.50?

Someone explain this, like I'm a 4 year old.