Cryptocurrencies dipped across the board following a report that the US was investigating the issuer of the Tether stablecoin that underpins much of the trading in the digital asset world.

The US is investigating Tether Holdings Ltd. for possible violations of sanctions and anti-money-laundering rules, according to people familiar with the matter, the Wall Street Journal reported.Bloomberg Terminal Tether’s USDT token, which seeks to maintain a one-to-one peg with the dollar, dropped to around 99.81 cents.