PANews May 6 news, according to CoinDesk, banking giant Citi and Swiss SIX Digital Exchange (SDX) are working together to tokenize unlisted equity to simplify a $75 billion market full of PDF files and paper documents. The two companies said on Tuesday that Citi will serve as the custodian and issuing agent for the tokenized version of pre-listed equity on SDX's regulated blockchain-based central securities depository (CSD) platform, which is in the late stage. The platform is expected to go online in the third quarter and will exclude US investors, but other regions can participate, with an initial focus on Switzerland, Singapore and other parts of Asia. SDX's blockchain-based securities depository is built on R3's Corda distributed ledger technology. Investors use Switzerland's dematerialized securities legal structure to gain access through their brokers and custodians. Digital asset banking group Sygnum and Singapore-based financial institution SBI Digital Markets will assist in providing access to pre-listed equity that Citi will introduce to the SDX platform.