OKEx, the world's largest cryptocurrency spot and derivatives exchange, announces that OKB Blockchain Foundation, the issuer of OKB, has launched its eighth and largest buy-back and burn of OKB tokens. From the period between March 1 and May 31, a total of 3,509,874.52 OKB was bought back and burned (equivalent to USD $19,000,000, as per OKB price on June 2, 2020). This represents a $1 million increase from the previous period.