Ether broke below $200 as its seven-day loss reached 33%

Ether fell below $200 on September 8, 2018, extending a selloff that had erased roughly one-third of its value over seven days and sharply widened its underperformance against bitcoin.

CoinMarketCap’s September 8 historical snapshot recorded ether at $197.95, down 9.50% over the publisher’s preceding 24-hour window and 33.18% over seven days. Its displayed market capitalization was $20.16 billion, based on a circulating supply of approximately 101.84 million ETH, while reported 24-hour trading volume was $1.52 billion.

The break mattered because ether was not merely following the wider cryptocurrency market lower. The same snapshot placed bitcoin at $6,225.98, down 3.87% over 24 hours and 13.39% over seven days. Ether’s seven-day percentage loss was therefore about 2.5 times bitcoin’s reported decline, although that comparison does not measure volatility or establish why either asset moved.

The measurement depends on the clock

Cryptocurrency markets traded continuously across exchanges, without a centralized closing auction or one official global price. CoinMarketCap aggregated venue data, and its surviving historical page does not disclose a precise snapshot timestamp alongside the table.

That limitation explains why contemporaneous observations from September 8 can show different prices. An Australian market report published at 8:26 a.m. AEST recorded ether at $218.95, down 3.2% over its preceding 24-hour comparison. CoinMarketCap’s later September 8 snapshot showed $197.95. These figures describe different moments and rolling windows, not contradictory official closes.

The broader comparison is less sensitive to intraday timing. CoinMarketCap’s September 1 snapshot placed ether at $295.34 and bitcoin at $7,193.25. Its September 8 table directly reported seven-day losses of 33.18% for ETH and 13.39% for BTC. Reported volume is an aggregated publisher estimate rather than an audited total of every trade worldwide.

Why ether carried distinct pressure

Ether occupied a special position in the 2018 market. Ethereum was the principal platform used by many initial coin offerings, and projects commonly received ETH from token purchasers. A falling dollar price could reduce the operating value of those treasuries and increase the amount of ETH a project would need to sell to meet the same fiat-denominated expenses.

Bloomberg Intelligence’s September 2018 outlook, using data mostly available through September 5, identified ERC-20 token inventories, projects’ need for capital and competition from other application platforms as pressures on ether. Those were contemporaneous analytical judgments, not transaction-level proof that ICO projects caused the September 8 decline.

The distinction is important. Public blockchain transfers could show assets leaving a treasury, but a transfer alone would not establish that the assets reached an exchange, were sold during the measured window or moved the market. The available exact-date evidence establishes relative price weakness; it does not establish a complete seller-by-seller explanation.

A disputed Wall Street narrative

The selloff also followed reports that Goldman Sachs had stepped back from plans for a dedicated cryptocurrency trading desk. Cryptocurrency prices dropped broadly on September 5 after that report circulated. By September 6, however, Goldman chief financial officer Martin Chavez had called the account inaccurate and said the bank had not supplied a firm timeline for its cryptocurrency plans.

Ether continued weakening into September 8 despite that denial. The sequence undercuts any simple claim that one Goldman headline fully explained the move. Regulatory uncertainty, reduced speculative demand, competing platforms and potential treasury sales were all part of the contemporaneous discussion, but the price record cannot allocate causal weight among them.

The defensible September 8 conclusion is narrower: ether crossed below $200 in CoinMarketCap’s aggregate snapshot, lost substantially more than bitcoin over the measured seven-day window and demonstrated that the 2018 contraction was placing exceptional pressure on the asset most closely associated with the ICO financing cycle.