The Fundamentals
These two graph show the relationship between supply of UST and the price of LUNA. It seems that they have a positive correlation meaning that the more UST in supply there is the higher the price of LUNA. This makes complete sense especially after 10% of LUNA was burned into UST. That would drastically increase the value of LUNA because the supply is going to drop very quickly. That also means the supply of UST would increase greatly as well.