Hi @DividendenWaschbaer, that's a good question. I believe that the tracking error is lower with synthetic mappings than with physical mappings. For this reason, and a recommendation from a friend, I ended up with this ETF, but am open to alternatives.
@DividendenWaschbaer very interesting, also has a significantly higher fund volume than $SPXS. Are you saving in this as your only ETF or another one to counteract the dependency on America?
