By the way, may I ask bitfinex guys: what kind of crazy arithmetics do you use in your api? 0.35% per day is not 128% per year, it is 258% per year.
0.35% per day it's 127.75% per year... You are the one with crazy arithmetics!
You can't just multiply the day interest by 365. If you borrow $100, and the interest rate is 0.35%, then tomorrow your debt will be $100.35, and 0.35% of $100.35 is $0.351225, not just $0.35 anymore, and so on, so on, and after a year you will owe $357.97, not $127.75.
But it's my way to calculate the interest, and the one banks uses to legaly cheat their clients. I don't know which one bitfinex uses. If somebody borrow $100 at 0.35%/day for 30 days, then after 30 days he will owe $110.50, not $111.05, or what?