Digital Securities: ADDX Launches First Crypto Fund by Trovio Crowdfund Insider. : ADDX (formerly operating as iStox), a digital securities exchange backed by the Singapore Exchange (SGX), has launched its very first product, according to a note from the company. ADDX has listed a crypto fund managed by Trovio Capital Management (TCM). The fund aims to a competitive option for crypto investing. The fund is said to have recorded a net return of 215% in 2020 and 205% in the first ten months of 2021. The offering is available to accredited investors.