注册并分享邀请链接,可获得视频播放与邀请奖励。

搜索结果 Ashin
Ashin 贴吧
一个关键词就是一个贴吧,路径全站唯一。
创建贴吧
用户
未找到
包含 Ashin 的推特
💕 “Will you marry me? I’m asking very seriously, you know~” 你要娶我吗?人家可是很认真在问哦~ 💕 Patreon :
0
3
348
16
转发到社区
2026Q1 HOWARD MARKS 和 OAKTREE CAPITAL TORM $TRMD:7.576億美元 Expand Energy $EXE:5.03億美元 Garrett Motion $GTX:4.61億美元 AngloGold Ashanti $AU:3.128億美元 Core Scientific $CORZ:2.298億美元 Viper Energy $VNOM:1.81億美元 Telephone and Data Systems $TDS:1.78億美元 Nokia $NOK:1.572億美元 SunOpta $STKL:1.347億美元 Petroleo Brasileiro $PBR:1.208億美元 Talen Energy $TLN:1.15億美元 Barrick $B:1.105億美元 CBL & Associates $CBL:9,940萬美元 Itau Unibanco $ITUB: 9,790萬美元 Liberty Global (LBTYA):9,710萬美元 Credo Technology (CRDO):9,630萬美元 TransAlta (TAC):8,420萬美元 Freeport-McMoran (FCX):7,740萬美元 Kilroy Realty (KRC):6,570萬美元 Grupo Aeromexico (AERO):5,960萬美元 XP Inc (XP):5,650萬美元 Bausch + Lomb (BLCO):5,410萬美元 Runway Growth Finance (RWAY):4,680萬美元 Liberty Latin America (LILAK):4,440萬美元 YPF Sociedad Anonima (YPF):3,930萬美元 Array Digital Infrastructure (AD):3,690萬美元 Cemex (CX):3570萬美元 Ecovyst (ECVT):3,470萬美元 Embraer (EMBJ): 2,620萬美元 Ternium $TX:2560萬美元 Rice Acquisition 3 $KRSP:2,490萬美元 Oaktree Specialty Lending $OCSL:2,220萬美元 Telecom Argentina $TEO:2010萬美元 Simply Good Foods $SMPL:1300萬美元 Magnachip Semiconductor $MX:1,210萬美元 SmartRent $SMRT:870萬美元 Battalion Oil $BATL:660萬美元 NRG Energy $NRG:660萬美元 Optimum Communications $OPTU:650萬美元 Liberty Latin America A $LILA:630萬美元 Asertio Holdings $ASRT:500萬美元 Invesco Senior Loan ETF $BKLN:410萬美元 HDFC Bank $HDB:280萬美元 PDD Holdings $PDD:45.9萬美元 Alvotech $ALVO: 33.3萬美元 BioXcel Therapeutics (股票代號:BTAI):28.9萬美元 NU、ORCL、SMH、GRAB 全部售出
显示更多
超淫乱派对8P,看上谁家媳妇,提上了大鸡吧就往上插,女人们刚刚开始还稍显害羞,被男人们插爽了,也放下了矜持,见到大鸡巴就塞进骚穴,嘴巴里含着一个! 本片高清完整版38分钟 已经更新在主页置顶电报群
显示更多
0
12
3.2K
190
转发到社区
和Quant Alex @StochAlex07 讨论: SABR Theta与Spot Theta+Vol Theta+Cross Theta的异同与应用,以及SABR模型自洽性分析。 **English Summary of the Chat** **SABR Theta vs Spot Theta + Vol Theta + Cross Theta** The conversation between **Alex Wu** (white bubbles) and **Jeff Liang** (green bubbles) is a technical discussion focused on **SABR Theta versus Total Theta** (i.e., Spot Theta + Cross Theta + Vol Theta), model self-consistency, PDE residual, and the correct definition of SABR Greeks. ### Key Points Discussed: 1. **SABR Gamma = Spot Gamma** (first major question, raised by Jeff) Jeff asked whether SABR Gamma (\(\partial^2 P / \partial F^2\)) is identical to Spot Gamma and whether it includes the dependence of \(\sigma_B\) on \(F\). He also provided the full chain-rule expansion of SABR Gamma in terms of Black-76 Greeks. Alex confirmed the understanding and **later affirmed in code** that this is exactly how SABR Gamma is implemented in their system. 2. **SABR Theta vs Total Theta and Model Self-Consistency** (main topic, led by Jeff) Jeff shared a clear 3-point understanding: - SABR Theta is computed directly via the SABR approximation formula to obtain \(\sigma_B\), then applying the Black-76 chain rule: \(\partial P/\partial t =\) BS_Theta(\(\sigma_B\)) + BS_Vega \(\cdot \partial\sigma_B/\partial t\). - Total Theta is the exact decomposition from the SABR PDE (Spot Theta + Cross Theta + Vol Theta). - When the model is **fully self-consistent** (Residual = \(\partial P/\partial t + \mathcal{L}P = 0\)), SABR Theta = Total Theta; otherwise the difference is the unexplained PnL caused by the approximation error in the Hagan formula (especially pronounced in long-dated, high vol-of-vol, or high-skew options). 3. **Practical Implication – Theta Decomposition Decision** (comment by Alex) Alex noted that whether to perform Theta decomposition depends on the risk-management approach: - Without decomposition → use SABR Gamma vs. dP/dt. - With decomposition → SABR Gamma maps to Spot Theta, Vanna to Cross Theta, and Volga to Vol Theta. **Overall Tone**: The discussion is highly technical and collaborative. Jeff drives the conversation by asking clarifying questions and presenting a well-structured 3-point summary of his recent study. Alex provides confirmations, practical insights, and code-level validation. Both participants demonstrate a strong command of SABR model nuances, particularly the relationship between approximation error, PDE residual, and real-world risk management.
显示更多