Is there a minimum investment amount to trade on our secondary market? iSTOX February 20, 2020 04:19 The minimum investment amount to trade on the iSTOX Exchange, our secondary market, is S$100. Related articles What are trading hours for the iSTOX exchange? Can I buy digitized securities without participating in an issuance? What is the difference between market & limit orders on the iSTOX Exchange? How do I liquidate my digitized securities? What fees does iSTOX charge investors?