fintech

A foray into fintech; a breakdown of the latest and greatest innovations in financial technology.

He Bragged About a $53 Million Paper Profit on Stage — No One Clapped
The lecture hall in Renmin University's School of Philosophy—early June, the air conditioning not quite doing its job. When Zhang Xiaolong stepped onto the stage, his dark blue suit jacket was already draped over the back of the chair, his white shirt sleeves rolled to mid-forearm. The oversized smartwatch on his left wrist lit up occasionally, the screen showing a jagged line of red and green.
By Jin2 months ago in Trader
SK Hynix Just Posted the Most Explosive Quarter in Semiconductor History — And the Market Obliterated $600 Billion
Start with the numbers. For the second quarter of 2026, SK Hynix delivered this scorecard: revenue of 79.32 trillion won (about $54.3 billion), up 257% year‑over‑year and 51% quarter‑over‑quarter; operating profit of 60.54 trillion won, up 557% YoY and 61% QoQ; an operating margin of 76%; net profit of 93.92 trillion won, up 1,242% YoY.
By Jin2 months ago in Trader
The Thermometer Already Went Off: South Korea’s 9th Circuit Breaker This Year
Seoul, July 29, 2026, 1:40 p.m. The KOSPI index dropped more than 8%. Screens froze. Trading halted for 20 minutes. That was the ninth time this year. Two months ago, the same index sat at 9,385 points, an all‑time high. Now it stands at 5,663, down nearly 40%. Samsung Electronics fell over 13%, SK Hynix nearly 10%. These two companies account for more than half the index's weight, collapsing side by side.
By Jin2 months ago in Trader
What No One Tells You About Becoming a Quant
The first lesson for a beginner is never about strategy. It’s the window on Jukuan where he just downloaded daily frequency data. The cursor blinks at the end of the first line of code. He originally meant to write a 5‑day moving average, but after typing df.info (), what catches his eye first is a few glaring missing values in the non-null count column.
By Jin3 months ago in Trader
Instant Noodles, Half a Trillion Dollars, and the 15‑Minute Fuse
3:45 PM: The Gravity Well and the Incinerator Every day at 3:45 p.m., roughly half a trillion dollars’ worth of contracts have fifteen minutes to decide whether they expire worthless or get assigned. The people holding these contracts, if they entered through the buy-side door, mostly know they bought a lottery ticket. The ticket just gets printed and torn up faster than they can say “bought.” This is the 0DTE option, zero days to expiration. It is time itself, sliced thin and sold.
By Jin3 months ago in Trader
How a 74-Year-Old Landlord Taught a Broker Everything the Market Wouldn’t
Michael Valentine, at thirty-one, that autumn, first seriously asked himself a question: apart from pouring fifty hours a week into the concrete mixer of life and taking a thin paycheck from a middle-aged foreman, was there another way to live?
By Jin3 months ago in Trader
The Trader Who Stopped Looking: How Zeroing In Made Him Profitable
He Deleted All His Watchlists Elliott Cross slammed his coffee mug onto the keyboard. It wasn't yet dawn in Manhattan. On the screen, the candlestick chart flatlined like an EKG, then jumped straight down. His natural gas long position had wiped out a month's profit in three minutes. It was the fourth time this week he'd been rinsed out by a false breakout.
By Jin3 months ago in Trader
The Best Investment I Ever Made Never Appeared in My Portfolio
When people ask about my best investment, they usually expect me to mention a stock. Maybe a company that doubled in value.
By Zidane3 months ago in Trader
The Investment I Regretted the Most Was the One I Never Made
If you ask people about their biggest investing regrets, most will tell you about the stock they bought at the wrong time. They'll talk about buying at the top.
By Zidane3 months ago in Trader
The Day I Learned That Being Right Doesn’t Always Make You Money
One of the biggest misconceptions I had when I first started trading was believing that success depended on being right as often as possible.
By Zidane3 months ago in Trader
The Day Trader Who Lost Everything
The Morning That Started Everything March 15th, 2019. 6:47 AM. Marcus Webbwas already awake. He was always awake by 6 AM now — had been for the past eight months. His bedroom in his apartment in Miami was dark, but the glow of his three monitors illuminated his face in a pale blue light. He hadn't slept more than four hours a night since he'd quit his job and started day trading full-time.
By Zidane3 months ago in Trader
How to Prepare for Your MSB License Application in Canada
Applying for an MSB license in Canada is much easier when you consider registration as part of your launch plan, not a last-minute form.
By GrowthCircuit3 months ago in Trader