The implications of the Taliban takeover of Afghanistan for neighboring Iran are not just in the realm of regional security, but also have economic and financial dimensions. Over the past few years, Afghanistan has emerged as a significant non-oil export market for Iran, and importantly, also a hub for bringing in foreign exchange.

In the aftermath of then US president Donald Trump’s 2018 withdrawal from the Iran nuclear deal and reimposition of sanctions, many economic players in Iran have used Afghanistan as a hub for hard currency transactions. Most importantly, according to multiple informed sources who spoke to Amwaj.media...