Options Greeks Explained: Delta, Gamma, Theta, Vega, Rho
The five options Greeks — delta, gamma, theta, vega, and rho — explained with OCC definitions, worked examples, a cheat-sheet table, and two visual guides.
Month: September 2026
Oura Files for Nasdaq IPO: $1.2B Revenue, $61M Net Income
Smart-ring maker Oura files S-1 for a Nasdaq listing under ‘OURA’ — with $1.21B in 9-month revenue (+74% YoY), 5M paid members, and $61M in net income. Goldman, Morgan Stanley, JPM lead.
Apple’s Sept 9 iPhone Event: What History Says About AAPL
Apple unveils the iPhone 18 Pro and its first foldable today. Here’s what Q3 results, KeyBanc’s price warning, and 24 past launches say about the stock.
T+1 Settlement: How Stock Trades Now Clear in One Day
T+1 settlement means US stock trades settle one business day after execution. Here’s the mechanics, timeline, and what changed for investors.
Cognition Hits $48B: $2B Series E as Devin Nears $1B ARR
Cognition raised $2B at a $48B valuation, nearly doubling from May’s $26B round as Devin’s ARR climbed from $492M to $900M in four months.
Qualcomm Jumps on Amazon AI Chip Deal: $15B by FY2029
Qualcomm shares rallied 2.75% Monday on a multi-generational AWS custom AI chip deal targeting ~$15B in data-center revenue by fiscal 2029.
What Is the P/E Ratio – and When Does It Mislead?
The price-to-earnings ratio is the most-quoted valuation metric on Wall Street. Here’s the formula, trailing vs forward, and when it breaks.
Boring Company Closes $20B Round on ‘Help or Forfeit’ Terms
Musk’s tunneling startup 3.5x’d its valuation in a $4B round — and made investors sign up for a role beyond writing checks.
Duolingo Rallies as Evercore Doubles Target to $210
Evercore ISI upgraded Duolingo (DUOL) to Outperform with a $210 target, citing durable growth as ChatGPT fears fade. Chegg tells the opposite story.
Options Explained: Calls, Puts, Strikes & Expiry Basics
Beginner-friendly guide to stock options: how calls, puts, strike price, expiry, and premium actually work, with worked examples and payoff diagrams.