It should be noted that this is always the case with monetary easing in general and there is nothing special with a negative interest policy in this regard: the gist is that it is a mere reflection of monetary easing effects.
The Digital Revolution has increased the growth potential in these countries. 2 Compiled by evidence-based economics research firm Roubini ThoughtLab based on 2016 data and  published in 2018 3 https://techcentral.co.za/fintech-seen-adding-150-billion-to-africas-gdp/83628/ 4 https://www.accenture.com/za-en/_acnmedia/PDF-85/Accenture-Pivoting-With-AI-POV-Brochure.pdf#zoom=50  Page 5 of 10  Estonia  A country leading the charge in embracing fintech and setting the pace towards the digital economy is Estonia.