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I am broadly curious by nature
This site is written from my own perspective: what I am learning, watching, building, and connecting across disciplines. It spans software systems, hardware prototypes, AI agents, robotics, fabrication, and a few non-technical interests outside work.
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Quant Trading
A-Share Concepts Explained ⑦: Northbound Flows, the Dragon-Tiger List, and Margin Trading — and Why Money-Flow Data Is Mostly Noise
Part 7 (finale) of the A-Share Concepts Explained series: what northbound flows are and why real-time intraday disclosure was discontinued, the statistical-trap methodology behind 'main capital net inflow,' the listing rules of the dragon-tiger list, the margin-trading concepts of margin balance and securities lending, and finally a principles checklist for beginners reading market data.
Quant TradingA-Share Concepts Explained ⑥: Dividends, Bonus Shares, and Ex-Rights/Ex-Dividend
Part 6 of the A-Share Concepts Explained series: the difference between the three ways of 'distributing' — cash dividends, bonus shares, and capital-reserve conversions; the record date / ex-date timeline; how the ex-rights/ex-dividend reference price is calculated; the dividend-tax holding-period tiers (20% under 1 month, tax-free after 1 year); and price recovery after ex-rights ('filling the gap'), falling below it, and the 'high bonus-share' illusion.
Quant TradingA-Share Concepts Explained ⑤: P/E, P/B, P/S, and Dividend Yield
Part 5 of the A-Share Concepts Explained series: the difference between the three P/E variants (static / forward / TTM), why P/B suits banks but not internet companies, the boundaries of P/S, how dividend yield is calculated and its traps, why ROE is the metric Buffett values most, and the shared 'rearview mirror' limitation of all valuation metrics.