一、SOFR 是什么(本质与口径)

  • 定义与覆盖面
    SOFR 是以美债作抵押的隔夜回购融资成本的广泛衡量,覆盖三大回购子市场(BNYM 三方、GCF、FICC 清算的双边 DVP),以成交量加权中位数计算,每个交易日纽约时间约 08:00 发布。

    “SOFR is a broad measure of the cost of borrowing cash overnight collateralized by Treasury securities… calculated as a volume-weighted median… published at approximately 8:00 a.m. ET.” (Federal Reserve Bank of New York)

  • “specials” 处理(避免被特定券“挤压”)
    FICC 的 DVP 部分会剔除最低利率的 20% 成交量以减轻 specials 影响。

    “20 percent of the lowest‑rate transaction volume from the DVP segment is removed each day.” (Federal Reserve Bank of New York)

  • SOFR 平均值与指数
    纽约联储还发布 30/90/180 天复利平均SOFR 指数(从 2018‑04‑02 起始值 1.00000000),方便“任意起止日”的复利换算。

    “The SOFR Index measures the cumulative impact of compounding… initial value set to 1.00000000 on April 2, 2018.” (Federal Reserve Bank of New York)


二、SOFR 家族与替代 LIBOR 的框架

  • 为何取代 LIBOR
    行业与监管采用“隔夜无风险利率 + 历史中位数利差”的回退法;USD LIBOR 的永久回退为复利 SOFR(计提在后)+ 五年历史中位数利差

    “Spread adjustments… based on historical 5‑year median spreads between USD LIBOR and compounded averages of SOFR.” (Federal Reserve Bank of New York)

  • Term SOFR 的定位(前瞻期限、源自期货)
    ARRC 明确:Term SOFR 基于衍生品(主要是 SOFR 期货),其稳健性依赖于基于隔夜 SOFR 的衍生品,因此应限制使用范围(尤其在衍生品市场)。

    “Term SOFR rates are based on derivatives products, primarily SOFR futures… use… needs to remain limited, particularly in derivatives.”


三、SOFR 交易生态(从场内到场外)

1)场内:SOFR 期货与期权(CME)

  • 三月期 SOFR 期货(SR3)
    报价 100 − R;R 为参考季度内按业务日复利的 SOFR每个基点 = $25;近月最小跳动 0.0025(= $6.25)。

    “Price is IMM Index = 100 minus Rate… ‘Rate’ is business‑day‑compounded SOFR… $25 per basis point… 0.0025… equals $6.25.”

  • 一月期 SOFR 期货(SR1)
    结算基于该交割月每日 SOFR 的算术平均

    “One‑Month SOFR futures (SR1)… based on the arithmetic average of daily SOFR values during the contract delivery month.” (CME Group)

  • 期权
    场内有 SOFR 期货期权可交易,用于方向或波动率表达。

    “Options on SOFR futures.”

  • 期货与 OIS 的“映射”
    SR3 价格近似反映合约季度的预期复利 SOFR;随着合约进入参考期,“未知天数”减少,预期成分权重下降、波动趋缓(交易 SR1 条带可细化前几个月预期)。

    “As the expiring contract progresses… the forward‑looking component… diminishes… the One‑Month SOFR futures strip will make a useful complement.”

2)场外:SOFR OIS、基差与期权

  • 标准化(强制上 SEF 的 MAT 品种)
    CFTC 批准部分 SOFR OISMAT,触发强制在 SEF/交易所执行;USD 固定腿通常 ACT/360,年付,付款滞后 2 日,浮动腿多为复利 SOFR。

    “Approval of a made‑available‑to‑trade determination for certain USD SOFR OIS… must be executed on a registered SEF… Fixed Leg… Payment Frequency: Annual… Day Count: ACT/360… Payment Lag: 2 Days.” (CFTC)

  • 成交惯例(起息)
    市场常规 T+2 起息

    “Market convention for SOFR swaps is for the Effective Date to be… two business days following the Trade Date.” (ISDA)

  • 计息口径(复利在后 + 观察移位)
    回退与 2021 ISDA 定义框架采用“计提在后的复利结构,并配合 lookback/observation shift”。

    “The fallback to compound SOFR in arrears… will have a lookback with observation shift.” (Federal Reserve Bank of New York)

  • Term SOFR 衍生品的边界
    ARRC 仅认可给终端用户用于对冲 Term SOFR 现金产品的衍生品;经纪‑自营商之间不鼓励交易 Term SOFR 衍生品。

    “Use in derivatives only if issued to end‑users to hedge cash products that reference Term SOFR… dealers should avoid trading Term SOFR derivatives with other dealers.”

  • Term SOFR–SOFR 基差
    最新细化允许非做市的第三方与做市商进行 Term SOFR–SOFR 基差互换以转移风险,但不建议做市商间互相交易。

    “A dealer may enter into Term SOFR‑SOFR basis swaps with any non‑dealer… interdealer Term SOFR basis swap transactions are not recommended.”

3)折现与抵押(CCP 生态)

  • “SOFR 折现大切换”(2020‑10)
    CME 与 LCH 在 2020‑10‑16/19 将 USD 清算互换的 折现与 PAIEFFR 切至 SOFR,并配合补偿与拍卖机制。

    “CME… successfully completed the SOFR Discounting Transition and Price Alignment Processing for USD IRS.” (CME Group)
    “LCH… transitioned over one million cleared contracts from Fed Funds to SOFR discounting and Price Alignment Interest (PAI).” (LSEG)

4)监管推动与流动性迁移

  • “SOFR First” 路线
    CFTC MRAC 于 2021‑07‑13 通过“SOFR First”,分阶段将互换、交叉货币、非线性与场内衍生品的交易惯例由 LIBOR 切换至 SOFR。

    “SOFR First is a phased initiative for switching trading conventions from LIBOR to SOFR…” (CFTC)

  • 现状
    ARRC 表示 SOFR 已取代 LIBOR 成为现金与衍生品的最广泛基准。

    “SOFR has now replaced LIBOR as the most widely used interest rate benchmark across both cash and derivatives products.”


四、如何“读价”与定价要点

  • 期货 → 利率:SR3 报价 = 100 − 预期复利 SOFR%(季度);SR1 对应交割月算术平均

    “Contract‑grade IMM Index: 100 minus R… R = compounded daily SOFR… (SR3).”
    “Arithmetic average of daily SOFR during the contract delivery month (SR1).” (CME Group)

  • OIS 现金流:固定腿多 年付/ACT/360,浮动腿为隔夜 SOFR 复利在后,常见有 2–5 日观测回溯observation shift

    “Fixed Leg… Annual… ACT/360… Floating… Annual… ACT/360.” (CFTC)
    “Fallback… compound SOFR in arrears… lookback with observation shift.” (Federal Reserve Bank of New York)

  • 复利因子/指数法:用纽约联储 SOFR Index 两期相除即可得到任意区间复利,对账、系统化都更稳。

    “The SOFR Index… allows the calculation of compounded SOFR averages over custom time periods.” (Federal Reserve Bank of New York)


五、常见交易与应用(实操视角)

  • 政策路径对冲:用 SR3 条带(例如 8–12 个季月)近似对冲 1–3 年政策路径;前 3–4 个月可叠加 SR1 提高临近 FOMC 的颗粒度。(SR3 反映参考季度复利,SR1 针对单月。)

  • 曲线交易

    • 加杠杆陡峭/趋平:跨季月日历价差(Calendar Spreads),或按 IMM 年度的 packs/bundles

    • OIS 曲线:用一揽子 SOFR OIS(1y、2y、5y、10y、30y)做 2s10s、5s30s 等 DV01 中性的曲线交易。

  • 基差与现金对冲

    • Term SOFR 贷款:对冲上首选 Term SOFR–SOFR 基差(符合 ARRC 的“终端用户对冲”边界)。

    “Use in derivatives only… to hedge cash products that reference Term SOFR.”

    • FF–SOFR 基差:近端用 SR1 vs Fed Funds 期货OIS 基差互换表达。
  • 风险管理:CCP SOFR 折现/PAI 意味着你的清算互换敏感度、补保证金与 PnL 都锚定 SOFR 曲线。

    “Transitioned… to SOFR discounting and Price Alignment Interest (PAI).” (LSEG)


六、前瞻与注意事项(实话实说)

  • 方法学微调在路上
    市场注意到 SOFR 偶发“跳点”可能与分位修剪及中位算法有关,媒体报道纽约联储已就方法学调整征求意见,目标是降低分布形态对最终中位数的影响,预计次年初实施。

    “Proposed changes to the SOFR calculation methodology… set to be implemented early next year… reduce the impact of rate distribution.” (Reuters)

  • Term SOFR 使用要自律
    官方与 ARRC 一致强调:衍生品应主要基于“隔夜 SOFR”Term SOFR 衍生品仅用于终端用户对冲,经销商间不宜扩散。

    “Derivatives markets should be primarily based on overnight SOFR… dealers should avoid trading Term SOFR derivatives with other dealers.”

  • 场外合约细节
    注意 起息(常 T+2)观察回溯天数支付滞后日计数(常 ACT/360)节假日日历(USGS、USNY)等条款差异,这些直接影响现金流。

    “Effective Date… two business days… Payment Lag 2 Days… Day Count ACT/360… Fixing Calendars US Government Securities.” (CFTC)


七、把 SOFR “用起来”的几条捷径

  1. 看日常数据:纽约联储 SOFR 页面 + Averages/Index。

    “Published… at approximately 8:00 a.m. ET.” (Federal Reserve Bank of New York)

  2. 定价核对:SR3 的 100 − R 与 OIS 复利公式是否一致;近月 SR3 的已知天数权重要体现在你的估值里。

    “100 minus R… R = compounded daily SOFR during the Reference Quarter.”

  3. 合规边界:涉及 Term SOFR 的对冲/中介,先对照 ARRC 的“限定用途”清单。

    “Use… limited… for derivatives only if issued to end‑users to hedge… Term SOFR.”


补充:术语一页通(极简)

  • OIS(隔夜指数互换):固定 vs 隔夜 SOFR 的复利;USD 常 ACT/360,年付

    “Fixed Leg… Annual… ACT/360… Floating Leg… ACT/360.” (CFTC)

  • PAI/折现:CCP 用 SOFR 计付抵押品的价格对齐利息,并用同曲线折现互换现金流。

    “Transition… to SOFR discounting and Price Alignment Interest.” (LSEG)

  • SOFR Index:复利“累乘器”,用 I(t₂)/I(t₁)−1 得到任意区间复利。

    “The SOFR Index… allows the calculation of compounded… over custom time periods.” (Federal Reserve Bank of New York)


结语(带点方法论的建议)

把 SOFR 交易当成三个层次来练:
基础:看懂官方口径与指数法;
中阶:用 SR3/SR1 和 OIS 做方向、曲线与基差的DV01 中性组合;
进阶:把 SEF/MAT 规则CCP 折现Term SOFR 边界方法学变更 变成日常检查清单。监管、口径与合约细节在这个市场里不是细枝末节,而是“地心引力”。

“CFTC… trade execution requirement for certain SOFR OIS.” (CFTC)
“SOFR First… switching trading conventions from LIBOR to SOFR.” (CFTC)


需要的话,我可以基于你现有的定价栈(Python/SQL)给一份SOFR 指数法的估值/敏感度模板,再配一张 SR3 条带 → 政策路径 的映射速查表,直接嵌到风控面板里。