(3) Starbond prices are determined by market demand. An upcoming adjust creates a demand, which pulls the starbond's price in the direction of the expected adjust.
If a starbond doesn't have an adjust on their schedule, there's no real reason to invest in the stock, so there's no demand. And no demand = the price will probably falls over time.
Some traders will take advantage of this by shorting starbonds that don't have an upcoming adjust - but the rate of return is really low, so it's mostly multi-billionaires who have bought every other investment opportunity and still have plenty of spare cash who follow this strategy.
Anyway, it's not profitable enough for small or even medium-sized ports, who would grow faster by putting their $H in upcoming movies and adjusts.