There's nothing pushing it down to 75 either. It's all speculative value within the band, and currently the band (according to conversions) is 1-1.05.

HBD hits the lower bound at $1 frequently because it keeps getting printed at a high rate as long as it is $1 or more, but if it stopped getting printed at $1, it wouldn't necessarily trade down to $0.75 regularly. There's nothing to push it down except speculation, and that can go either way.

DHF is a good point. That keeps getting paid out (essentially printed) even <$1 since there is no option on payout. That's much smaller than post payouts though (excluding stabilizer which returns it).