Does it cost to keep a long open on BitMex?

Don’t be a faggot and answer OP’s question

you get like 0.1% a day if shorts are high

shove a x4 leverage on and that becomes almost 0.5% a day

x4 is super safe if you get in at low 6k's

if the rate is negative shorts pay longs, if its positive longs pay shorts. it's calculated based on an equation found on the website that basically makes it be tilted in one direction if the weighted average of the trades were far above or below the index in the preceding 8 hour period. therefore you can see the next rate one period in advance. there are 3 funding charges a day, every 8 hours.

you can download the funding history. I ran the numbers over the past year (a month ago) and funding was pretty heavily accrued to shorters (i.e. you would have made money from funding keeping a short open for a whole year vs paying for a long) this makes since because of the demand during the bull run and people overpaying/lack of short liquidity at points. recently the rates have been a lot closer to 0 but there are still plenty of times where there is a pretty extreme funding rate, especially considering the leverage. it's not hard to go on a few hours before funding, put in limit orders in the direction that receives funding if there is a high rate, and then just collect the funding. it's not without risk but I'm saying you can make substantial payouts just from funding due to the leverage with not that much money if you manage it right