As far as Futures involved, it cannot. https://www.elitetrader.com/et/threads/can-ng-fall-below-zero-like-cl.343597/page-2
A negative currency? That means the more money you have, the higher your... debt! An excellent scenario for a Twilight Zone episode, too bad Rod Serling is not here anymore.
That would solve the poverty in the world. Billions of people would be rich and only 1% would be very poor! Just think about how many of this 1% would lose their wives as their only attraction, money, would disappear. There would not be enough golddiggers then to serve all these rich old men. https://trendingposts.net/trending-celebrity-news/old-billionaires-with-young-wives/
Guys, thanks for the interesting conversation with facts and thoughts. As a beginner, I was very interested in reading this.
Negative oil futures was purely a technical issue, many traders assumed that they will always be able to avoid delivery by selling contract to someone else. How can this issue emerge with fx futures (which delivery involves simply a change of bank deposits one to another)?