Tether’s Turnover Towered Over Its Size While Kraken Barely Traded It

On September 16, 2018, Tether occupied an unusual place in the cryptocurrency market: it ranked eighth by reported market capitalization, yet its reported 24-hour trading volume was larger than Ether’s. CoinMarketCap’s dated historical snapshot listed USDT at $1.0010, with a $2.759 billion market capitalization and $2.103 billion in volume over its stated 24-hour window.

That volume equaled approximately 76.2% of USDT’s reported market value, a Coinburn calculation. By comparison, the same snapshot put Bitcoin’s volume-to-market-cap ratio at about 2.9% and Ether’s at about 6.7%. The comparison does not measure investment returns or prove that an equivalent amount of fresh money entered each asset. It shows how frequently a dollar-referenced token was reported as changing hands relative to the value then outstanding.

A stablecoin near the top of the volume table

CoinMarketCap listed Bitcoin first by volume at $3.274 billion, USDT second at $2.103 billion and Ether third at $1.502 billion. USDT therefore generated about 64.2% as much reported volume as Bitcoin and 40.0% more than Ether, despite its market capitalization being only about one-eighth of Ether’s and one-fortieth of Bitcoin’s.

The structure mattered because USDT was not primarily marketed as a speculative asset. It was designed to track one U.S. dollar and function as transferable dollar-like value across cryptocurrency venues. Tether had said earlier in 2018 that the token’s trading volume regularly exceeded $1 billion across many exchanges. That was an issuer’s characterization of its own product, not an independent audit of the trading activity or reserves.

The September 16 snapshot supports a narrower conclusion: reported crypto-market liquidity was already relying heavily on a stablecoin whose market-value rank understated its position in gross trading flows. Volume is gross turnover, however. It can count the same units repeatedly and does not identify unique users, net capital movement, redemptions, fiat deposits or on-chain settlement.

Kraken showed the other side of a fragmented market

Kraken’s official daily report for September 16 recorded $57.6 million traded across all markets on the exchange. Ether accounted for $27.7 million and Bitcoin for $21.9 million, or approximately 48.1% and 38.0% of Kraken’s total, respectively. USDT accounted for only $101,492, approximately 0.18%.

Kraken also listed ETH at $221.60, down 0.68% for its reporting day; BTC at $6,499, down 0.46%; and USDT at $1.00, up 0.02%. The subdued price changes were not the main finding. The striking point was the venue split: an asset ranked second in CoinMarketCap’s aggregate 24-hour volume table was a minor part of Kraken’s reported activity.

That difference should not be read as a direct market-share calculation. CoinMarketCap aggregated reported activity across covered markets, while Kraken described one exchange across crypto- and fiat-denominated markets. The surviving pages do not provide a shared observation timestamp, and Kraken’s page does not state a precise timezone or cutoff. Their volume-inclusion rules may also differ.

What the September 16 record establishes

September 16, 2018 is best preserved as a market-structure snapshot, not a breaking-price event. Bitcoin held near $6,500 and Ether near $220, but the more consequential condition sat underneath those prices: USDT was turning over at a scale comparable with the largest cryptoassets across the aggregated market while remaining marginal on at least one major fiat-connected venue.

The evidence does not establish why traders chose particular venues or pairs, whether every reported trade reflected economic activity, or whether USDT’s reserves matched tokens outstanding. It establishes a dated asymmetry in reported liquidity—and shows why aggregate crypto volume could not be treated as one homogeneous global market.