Earlier quoted context omitted.
> How important is a liquidation preference on a $500m round which values Uber at $40b? Not very. Why is that?
A 1X liquidation preference on a $500m investment is only relevant if the price of Uber declines by 98.75%. If it is 2X, then only relevant if price of Uber declines by 97.5%. [Edit: Wow was I not awake when I wrote this. Retracted but left up for posterity.]
No, that's wrong. The investor loses nothing until the value declines to $500 million and then suffers linear losses afterward (i.e. if value is $100M then they lose $500-100=$400M).