up the ante means to raise the stakes in a poker game.
(anti has a different meaning it means against)
And I do think it's fascinating since as Tony Rovira predicts in that AFR article, the lithium space in Australia is going to become concentrated into a few major players.
This is way better for the ordinary punter IMO than holding GME GameStop which was betting against the big money (Dumb Money is a must see on release October 26).
Shorters are in low supply for AZS with good reason....
AZS Price at posting:
$2.70 Sentiment: Buy Disclosure: Held