http://www.telegraph.co.uk/finance/economics/11895084/How-Swedens-negative-interest-rates-experiment-has-turned-economics-on-its-head.html

Negative interest getting an airing in the economics section of The Telegraph. They haven’t yet realised the potential of the concept, but it’s a step in the right direction: https://malcolmhenry.com/2013/11/18/the-positives-of-negative-an-idea-to-change-the-world/