Abstract
Seven of the ten largest stablecoins are backed by fiat assets. The 2016 and 2017 vintages of stablecoins have failure rates of 100% and 50% respectively. More than one-third of stablecoins have failed. Tether has a 39% share of 1.77 trillion USD in 2021Q2 transactions, and USD Coin 28%. The top three stablecoins have an average velocity of 28.3. Tether transacted between 3.8 million unique addresses, 63% of the ERC-20 token network. Six of the top ten tokens have unconcentrated Herfindahl indices, but Gemini, Pax and Huobi have single holders with more than 50% of the supply. The median Tether transaction fee is similar to the cost of an ATM transaction, but they are three to four times more for Dai and USDC. Fees, which are proportional to the price of Ethereum, are rising though. Median fees for Tether rose 3,628% over the last year, and 1,897% for USD Coin. 24 hour exchange turnover in Tether is nearly $120 billion. This is comparable to the daily volume at the NYSE and almost ten times the daily flow in money market mutual funds. Narrow bid-ask spreads and depth have attracted active HFT participation.
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