Why is there no double rollover interest for forex trades carried overnight on Thursdays?

External question — Personal Finance Stack Exchange Author: kcardinalis Original post: https://money.stackexchange.com/questions/157922 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. Why is there no double rollover interest for forex trades carried overnight on Thursdays? I have been looking everywhere to find an answer to this question, and finding absolutely nothing. I'd appreciate any insights anyone can offer.