Bitcoin futures basis on the CME has climbed above the 2-year Treasury yield for the first time in months, a shift that makes the cash-and-carry trade look profitable again. On Aug. 7, the annualized basis for the August contract stood at 7.89%, versus 4.19% for the 2-year Treasury. The September and December contracts also cleared that bar, at 6.25% and 5.69%. The move comes as U.S. spot Bitcoin ETFs logged $853.54 million in net inflows for the week ended Aug. 7, with positive flows every session.
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Translation: "CME的比特币期货基差几个月来首次超过两年期美债收益率，这一转变使得现金套利交易（cash-and-carry trade）看起来再次有利可图。8月7日，8月合约的年化基差为7.89%，而两年期美债收益率为4.19%。9月和12月合约也超过了这一水平，分别为6.25%和5.69%。与此同时，美国现货比特币ETF在截至8月7日的一周内录得8.5354亿美元的净流入，且每个交易日均为正流入。"
Note: "cash-and-carry trade" is a term, we can translate as "现金套利交易" or "现货-期货套利" but keep as "现金套利交易" or "持有现货并做空期货的套利策略". I'll use "现货-期货套利" but maybe "现金套利" is common. Actually, it's "cash-and-carry" meaning buy spot and sell futures, so "现货-期货套利" is clear. But we can also say "现金套利" but that might be ambiguous. I'll use "现货-期货套利" in parentheses? But we need to keep it natural. Let's translate as "使得现货-期货套利（cash-and-carry trade）看起来再次有利可图" but we can also just say "套利交易" but it's specific. I'll go with "现货-期货套利" and maybe add the English in parentheses? But the requirement says "Keep proper nouns (names, company names) in original form" but this is a term, not a proper noun. We can translate it. I'll use "现货-期货套利" without parentheses, since it's clear.
Also, "logged" means recorded, so "录得".
Next heading: "Basis flips above Treasuries
" → "基差翻转超过美债" but better: "基差超过美债" or "基差超越美债". I'll use "基差超过美债" as heading.
Paragraph: "Analyst Marc Baumann had been tracking a 157-day stretch where the crypto basis trailed the 2-year yield, with his figures showing the spread near 3% and the Treasury at 3.8%. But a matched-date calculation for Aug. 7 puts the basis well above that, breaking the streak. The gap between the August contract and the Treasury is now 3.7 percentage points, a level that hasn't been seen in months. The basis is the annualized return from holding spot and shorting futures, and when it exceeds the risk-free rate, the carry trade looks attractive."
Translation: "分析师Marc Baumann一直在追踪加密货币基差低于两年期美债收益率的157天走势，他的数据显示利差接近3%，而美债收益率为3.8%。但8月7日的同日计算显示基差远高于该水平，打破了这一纪录。8月合约与美债之间的差距现在为3.7个百分点，这是几个月来从未见过的水平。基差是持有现货并做空期货的年化回报，当它超过无风险利率时，套利交易看起来具有吸引力。"
Note: "matched-date calculation" means calculation on the same date, so "同日计算". "trailed" means below, so "低于". "spread" is "利差". "carry trade" is "套利交易" but we already used "现货-期货套利" earlier, so here we can say "套利交易" or "持有现货并做空期货的套利". I'll use "套利交易" since it's clear from context.
Next heading: "ETF inflows stay strong
" → "ETF资金流入保持强劲"
Paragraph: "The week's $853.54 million in net inflows came with positive flows in every session, a sign that demand for the funds remains steady. The pace suggests institutional interest isn't fading, even as the basis trade draws attention. That's a notable contrast to the July data, which showed a much slower month overall."
Translation: "本周8.5354亿美元的净流入伴随着每个交易日的正流入，表明对这些基金的需求保持稳定。这一速度表明，即使基差交易引起关注，机构兴趣并未消退。这与7月的数据形成鲜明对比，7月整体来看是一个缓慢得多的月份。"
Note: "session" here means trading day, so "交易日". "fading" is "消退". "notable contrast" is "鲜明对比".
Next heading: "The 'riskless' trade has costs
" → "'无风险'交易也有成本" or "所谓'无风险'交易其实有成本". I'll use "'无风险'交易有成本" but better: "'无风险'交易并非无风险" but the heading says "has costs", so "有成本". I'll use "'无风险'交易也有成本".
Paragraph: "The cash-and-carry trade—buying spot Bitcoin and shorting futures—is often pitched as riskless arbitrage. But a Bank for International Settlements study found that one-month CME Bitcoin carry exceeded 20% at points in 2021, and it documented financing, leverage, margin, and liquidation risks. The article notes that calling the trade 'riskless' obscures costs like financing, margin, fees, and execution risks. Even with the basis above Treasury yields, those costs eat into the spread."
Translation: "现货-期货套利——买入现货比特币并做空期货——通常被宣传为无风险套利。但国际清算银行的一项研究发现，2021年CME比特币一个月期套利收益率在某些时点超过20%，并记录了融资、杠杆、保证金和清算风险。文章指出，称该交易'无风险'掩盖了融资、保证金、费用和执行风险等成本。即使基差高于美债收益率，这些成本也会侵蚀利差。"
Note: "carry" here means the return from the carry trade, so "套利收益率" or "持有收益". I'll use "套利收益率" but "carry" is often used as "carry yield". I'll say "一个月期CME比特币套利收益率". Also, "financing, leverage, margin, and liquidation risks" – we can translate as "融资、杠杆、保证金和清算风险". "execution risks" is "执行风险". "eat into" is "侵蚀".
Next heading: "Data discrepancies
" → "数据差异" or "数据不一致". I'll use "数据差异".
Paragraph: "There's also a wrinkle in the July ETF flow data. The article points out that July net inflows were about $172 million, while July
