From January 2015, she started to practice leetcode questions; she trains herself to stay focus, develops "muscle" memory when she practices those questions one by one. 2015年初, Julia开始参与做Leetcode, 开通自己第一个博客. 刷Leet code的题目, 她看了很多的代码, 每个人那学一点, 也开通Github, 发表自己的代码, 尝试写自己的一些体会. She learns from her favorite sports – tennis, 10,000 serves practice builds up good memory for a great serve. Just keep going. Hard work beats talent when talent fails to work hard.
Tuesday, December 30, 2025
2026 Stock trading plan | 2026年的美股清单:三大方向,九只股票。希望大家都能在2026年,提前卡位风口
我是 Cecelia,前华尔街投行分析师、长期实盘交易者。这里不喊口号、不堆概念;所有结论都来自多年交易经验+当下持仓复盘。 你能在这里得到什么? 1)方法可复用:一套从“选股→择时→仓位→风控”的通用流程,覆盖大盘、热门股与ETF。 2)实盘复盘:展示真实交易记录与复盘清单,复现“为什么买/为什么卖/哪里做错”。 3)避坑指南:新手高频错误、情绪与风险管理,给到撤退规则而不是空谈“长期”。 我的频道内容主要有: 1)新手入门:零基础也能照做的选股与风控模板 2)热点拆解:财报与估值怎么影响股价,用数据说话 3)持仓体检:用统一表格评估你的个股与仓位风险 4)每周复盘:市场信号、交易得失、下周可执行清单 所有内容基于我的多年美股交易与研究记录,仅供学习交流;不构成投资建议,执行前请自定风控。 往期阅读:
Monday, December 29, 2025
Friday, December 26, 2025
Monday, December 22, 2025
FDX stock | FedEx (NYSE:FDX) Given New $305.00 Price Target at Raymond James Financial
FedEx (NYSE:FDX) Given New $305.00 Price Target at Raymond James Financial
Key Points
- Raymond James raised its price target on FedEx to $305 (from $255) and kept an "outperform" rating, implying roughly a 5.3% upside from the prior close.
- FedEx beat Q results with EPS of $4.82 vs. $4.02 est. and revenue of $23.47B (up 6.8% Y/Y), and set FY2026 guidance of 17.8–19.0 EPS (street expects ~19.14).
- Analyst views are mixed—the consensus price target is about $299.12 with an average "Hold" rating, even as several firms (e.g., BofA $315, UBS $314) recently raised targets; institutional investors own ~84.5% of the stock.
- MarketBeat previews the top five stocks to own by January 1st.
FedEx (NYSE:FDX - Get Free Report) had its target price raised by analysts at Raymond James Financial from $255.00 to $305.00 in a research report issued to clients and investors on Monday,MarketScreener reports. The firm presently has an "outperform" rating on the shipping service provider's stock. Raymond James Financial's target price indicates a potential upside of 5.28% from the company's previous close.
FDX has been the topic of a number of other reports. Bank of America raised their price objective on FedEx from $285.00 to $315.00 and gave the company a "neutral" rating in a report on Friday. Cowen reiterated a "buy" rating on shares of FedEx in a report on Friday. UBS Group increased their target price on FedEx from $293.00 to $314.00 and gave the stock a "buy" rating in a research note on Friday, September 19th. TD Cowen increased their target price on FedEx from $271.00 to $313.00 and gave the company a "buy" rating in a research note on Friday. Finally, Morgan Stanley upped their price target on shares of FedEx from $200.00 to $210.00 and gave the company an "underweight" rating in a research report on Friday. One equities research analyst has rated the stock with a Strong Buy rating, fifteen have assigned a Buy rating, thirteen have given a Hold rating and two have given a Sell rating to the company's stock. According to MarketBeat.com, FedEx presently has an average rating of "Hold" and a consensus price target of $299.12.
Institutional investors have recently modified their holdings of the company. Grey Fox Wealth Advisors LLC acquired a new position in shares of FedEx in the 3rd quarter worth approximately $27,000. NewSquare Capital LLC boosted its stake in shares of FedEx by 121.8% in the 2nd quarter. NewSquare Capital LLC now owns 122 shares of the shipping service provider's stock valued at $28,000 after purchasing an additional 67 shares during the last quarter. Twin Peaks Wealth Advisors LLC bought a new stake in shares of FedEx during the 2nd quarter valued at $28,000. Wealth Watch Advisors INC acquired a new position in shares of FedEx during the 3rd quarter worth about $28,000. Finally, Ameriflex Group Inc. increased its stake in FedEx by 103.3% in the third quarter. Ameriflex Group Inc. now owns 124 shares of the shipping service provider's stock valued at $29,000 after purchasing an additional 63 shares in the last quarter. Institutional investors and hedge funds own 84.47% of the company's stock.
Sunday, December 21, 2025
著名大空头:美国AI发展依赖英伟达注定输给中国
电影《大卖空》原型人物贝瑞表示,美国若不从英伟达芯片目前的发展轨迹转向,将在全球AI竞争中注定输给中国。(图/路透社/达志影像)
以精准预测2008年次贷危机闻名、电影《大卖空》原型人物麦可贝瑞(Michael Burry),今(20)日在社群网络上再度示警,称美国若不从英伟达芯片目前的发展轨迹转向,将在全球AI竞争中注定输给中国。
贝瑞秀出《彭博》以国际能源总署(IEA)数据制作的图表,可以看到中国的已安装发电产能遥遥领先美国,且双方的差距仍在迅速扩大中。
贝瑞表示,英伟达的发展路线图本质上就是一张耗电量成长路线图,所谓的创新,实际上仅仅只是设法替更大、更热的芯片供电和散热。由于运算装置的安装速度,已经超过发电效率提升的幅度,对电力的需求只能不断攀升。
但从上面那张图表已经可以看到,这并不是美国能够取胜的道路。因为中国的发电量遥遥领先,且关键在于中国电力生产发展的速度与美国的差距还在持续扩大中。
贝瑞指出,由于审批问题,美国的电网发展实际上正在放缓,相较之下,中国则在不受限制地根据电力输出需求建设输电网络。贝瑞强调,如果这被视为是一场AI军备竞赛,那么美国企业正把资本大量投入在结构上注定失败的竞赛之中。
因此,贝瑞认为美国需要摆脱“芯片越做越大、越来越耗电”的路线,转而全力投入发展AI专用芯片(ASIC)的创新。但是,英伟达透过对众多美国重要AI企业和新创公司的投资与合作协议,已经牢牢掌控着美国AI生态系的发展。
Friday, December 19, 2025
高级期权策略深度解析:螃蟹交易 (Crab Trade) 完全笔记
最近接触到一个期权策略:“螃蟹策略(Crab Trade) ” 。感觉有点意思,于是做了个笔记,包括其核心思想、构建与应用、风险管理,并将其与其他相关收入型策略进行深度对比,以形成一个完整的了解。
1. 策略核心思想与盈利逻辑
• 核心比喻:策略如其名,适用于预测股价不会发生剧烈涨跌,而是会像螃蟹一样横盘整理或小幅温和爬行的行情。 • 策略目标:它并非追求方向性暴利的策略,而是一种收入型策略。其主要目标是通过卖出期权收取权利金,赚取市场稳定下的确定性收益。 • 三大盈利引擎: • 时间价值衰减 (Theta Decay):作为最主要的利润来源,策略中卖出的短期期权(蟹腿)价值会随着时间流逝而快速衰减。 • 隐含波动率挤压 (IV Crush):在财报等重大事件结束后,市场不确定性消除,期权的隐含波动率 (IV) 会大幅下降,导致卖出的期权价格下跌,从而获利。 • 温和的方向性收益 (Delta):如果股价朝预期的方向温和移动,策略的“身体”部分也会贡献一部分利润。
2. 策略构建详解:从理论到实践
策略由一个较长期的“身体”和一个或多个较短期的“蟹腿”组成。
• 看涨螃蟹策略 (Bullish Crab Trade) • 预期:股价将横盘或温和上涨。 • 身体 (Body):构建一个较长期的看涨价差组合 (Bull Call Spread)。 • 动作:买入一张较低行权价的Call,同时卖出一张较高行权价的Call。 • 为何用价差组合?:相比只买一张Call,价差组合成本更低、风险更可控、时间损耗更小,是更稳定、更符合策略精神的“锚”。 • 蟹腿 (Legs):卖出数量更多的短期看涨期权 (Short Calls)。 • 动作:卖出2份或更多的、即将到期的看涨期权。 • 目的:策略的核心利润引擎,旨在一次性收取大量权利金。 • 看跌螃蟹策略 (Bearish Crab Trade) • 预期:股价将横盘或温和下跌。 • 身体 (Body):构建一个较长期的看跌价差组合 (Bear Put Spread)。 • 蟹腿 (Legs):卖出数量更多的短期看跌期权 (Short Puts)。
3. 实战应用:标的与参数选择
• 如何选择股票标的: • 高隐含波动率:寻找因财报等事件导致IV膨胀的股票,这是利润的燃料。 • 高流动性:期权交易量必须大,买卖价差要窄。首选大型科技股和指数ETF。 • 股性稳健:避开历史上走势极端的“妖股”,选择业务成熟、走势相对稳健的公司。 • 如何选择行权价与Delta值: • 构建“身体”: • 买入腿 (Long Leg):通常选择 Delta 0.30 - 0.50,以建立温和的方向性。 • 卖出腿 (Short Leg):通常选择 Delta 0.15 - 0.25,以定义利润区间的上限。 • 构建“蟹腿”: • 行权价:通常设置在“身体”卖出腿的行权价之上(看涨)或之下(看跌),构建坚固防线。
4. 风险管理:当策略失效时
当市场走势与预期相反,出现极端行情时,必须将风险控制置于首位。
• 首选方案:直接认亏平仓 • 这是最专业、最理智的选择,能有效停止亏损、避免情绪化决策、遵守交易纪律。当股价突破关键防线或亏损达到预设上限时,应果断执行。 • 备选方案:事后调整/补救(高级技巧) • 警告:此方案目标是减少亏损,而非扭亏为盈,操作不当会加剧亏损。 • 主要方法:滚动 (Rolling)。当股价突破“蟹腿”时,可买回当前的“蟹腿”,同时卖出行权价更高/更低、到期日更远的新“蟹腿”,以空间和时间换取转机,但这本质上是追加了新的风险。
5. 核心策略对比:知其所以然
• 螃蟹策略 vs. Iron Condor (铁鹰策略) • 核心区别:方向性与风险结构。 • Iron Condor:是纯中性策略,两侧风险均有限,像一个不倒翁,赌股价横盘。 • 螃蟹策略:带温和偏向性,但一侧风险无限,像一个倾斜的帐篷,希望股价能温和爬升/下降。 • 螃蟹策略 vs. 对角价差 (Diagonal Spread) • 核心区别:合约数量比例。 • 对角价差:是 1 : 1 结构,风险有限,主要目标是降低长期持仓成本,如同“收房租补贴房贷”。 • 螃蟹策略:是 1 : N (N>1) 结构,一侧风险无限,主要目标是激进地收取短期权利金,如同“加盖多个阳光房来出租”,收入高但风险也集中于此。它本质上是对角价差与比例价差的混合体。


