<-bsp-bb-link state="{"bbHref":"bbg://securities/2213302D%20VI%20Equity","_id":"0000018f-2a58-d583-afbf-eadccd020000","_type":"0000016b-944a-dc2b-ab6b-d57ba1cc0000"}">Tether Holdings Ltd.-bsp-bb-link>, the issuer of the biggest stablecoin, said it invested $200 million in <-bsp-bb-link state="{"bbHref":"bbg://securities/2011618D%20US%20Equity","_id":"0000018f-2a58-d583-afbf-eadccd020001","_type":"0000016b-944a-dc2b-ab6b-d57ba1cc0000"}">Blackrock Neurotech-bsp-bb-link>, a maker of brain-computer interface technology.