It seems that SXY have exhausted all the sellers willing to sell at 28.5 cents. Can't imagine that more than 1-2% of total holders would be willing to sell between 29-32 cents, for example.
Put simply, those inclined to sell will already have done so. Those who haven't sold yet will want significantly more before they part with their shares.
Can't believe my luck, as topped up very recently.
ACN Price at posting:
28.5¢ Sentiment: Buy Disclosure: Held