ChestnutBearWhat the news means for markets.
Plain-language analysis of geopolitics, AI, stocks and crypto — plus free tools that run right in your browser.
Latest analysis
- AI The AI Bill Comes Due: What Alphabet's Plunge Really Repriced
Alphabet fell about 12% in a day and dragged the Nasdaq down with it. This is a valuation reset, not the end of AI: the technology is real and these are hugely profitable companies. The open question is whether the froth is fully out — and a few concrete markers help judge how close a bottom is.
- Geopolitics The US and Iran: Strategy, or Theater?
Oil is back near its highest since 2022 and Washington is again hinting at strikes. This opinion piece argues the US campaign against Iran looks more like a costly performance than a strategy — because its stated goal is unreachable without a ground war it will never fight — and that time quietly favors Iran.
- Geopolitics Why Putin Won't Agree: The Ukraine 'Freeze' Is Unlikely to Hold
Zelensky has offered to freeze the front line. This opinion piece argues Putin will not accept it: for Russia the deal carries more cost than benefit, and the price Moscow would demand to say yes is one the West — with Europe's resolve still firm — cannot pay.
- Crypto Bitcoin Below $81,000: The Macro Forces Behind Crypto's October Slide
Bitcoin has fallen under $81,000 and Ethereum has dropped harder. The real drivers are macro: a Fed that is hiking instead of cutting, expensive oil, ETF outflows that reversed from support to pressure, and a wave of leveraged liquidations. Here is what happened and what to watch.
- Geopolitics Oil Is Back Above $100: Why Force Won't Solve the Iran Problem
The US–Iran conflict has pushed oil back above $100 and weighed on stocks. Bombing, decapitation and sanctions have not broken Iran's Revolutionary Guards. This opinion piece argues that economic growth, not more pressure, is the realistic way out.
- Geopolitics How geopolitical shocks tend to move markets: a simple framework
A plain-language checklist for thinking about what a sudden geopolitical event could mean for oil, gold, stocks and crypto, and why the first reaction often fades.
Heat Index →
Which topics are heating up? Several sources, one score and a 30-day trend, updated automatically.
Free tools
ProjectorCast — free Windows casting app
Send videos to a DLNA projector or smart TV over Wi-Fi, or cast any window or desktop to a projector over HDMI. Under 100 KB, no install.
WindowsBearDrop — scan-and-send files between phone and PC
Transfer files between your phone and PC over Wi-Fi by scanning a QR code. No app on your phone, no login, no upload to any server. Free, under 100 KB.
CBM & Container Loading Calculator
Enter carton sizes to get total CBM, gross weight, air chargeable weight, sea LCL W/M and how many cartons fit in a 20GP, 40GP or 40HQ container.
China Coordinate Converter (WGS84 · GCJ-02 · BD-09)
Convert coordinates between GPS (WGS84), Chinese map coordinates (GCJ-02, used by Amap and Tencent) and Baidu (BD-09). Paste one or thousands of points and download a CSV.
qPCR ΔΔCt Calculator (2^-ΔΔCt fold change)
Paste Sample, Gene and Ct values from Excel or your instrument and get mean Ct, ΔCt, ΔΔCt and fold change with error ranges. Export to CSV. Data never leaves your browser.
Molarity & Dilution Calculator (C1V1 = C2V2)
Work out how much to weigh for a given molarity and volume, or how much stock to dilute. Leave any one value blank and it is calculated, with unit conversion built in.
Trade Profit & Loss Calculator
Enter entry price, exit price, quantity and fees to see profit, loss and percentage return for a long or short trade.
Compound Interest Calculator
See how a starting amount and monthly contributions can grow over time at a given annual return, with a year-by-year table.
Get the weekly briefing
One email a week: the key news and what it could mean for markets. No spam, unsubscribe any time.