Latest mind-shifting thoughts, updates, ideas, and more
Viet Phan
Starting with Reinforcement learning is scary
You need Anaconda, OpenAI Gym… and a prayer.
So I overfit my first agent from scratch. As any beginner would do.
Result: Buy/Sell Acc. 53.54%, Total reward: 7
Definitely not a money printer…but hey, at least got ball rolling https://t.co/dzgzVeLnxM
11:39 AM · Apr 21, 2025
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Viet Phan
In 2024, Jane Street sued Millennium over a stolen $1B trading strategy targeting India’s retail options traders
Their trick? Triggering tiny index moves minutes before expiry, trapping all instantly
Retail thought they found easy money. Turns out, they were the easy money https://t.co/p6IQ6F5Zul
6:39 PM · Apr 19, 2025
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Viet Phan
Just a reminder in though times
Time in the market > timing the market
Even if you monumentally nailed the COVID peak, DCAing that falling knife still beats being off
Yeah, you’ll bleed fees and shave off bit of return, but at least you’ll actually sleep through the next crash https://t.co/wXdWk2omSo
6:51 PM · Apr 16, 2025
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Viet Phan
I am too broke for ChatGPT Pro, yet too eccentric for Gemini Advanced. https://t.co/WsTc9zQHbv
7:18 AM · Apr 16, 2025
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Viet Phan
Spending my evenings coding my options pricing algo.
Only to have it output prices so far out-of-the-money, it’s practically pricing options on Mars.
Guess my model expects markets to crash harder than my than my motivation on a Friday afternoon. https://t.co/wwZbISTDWw
8:30 PM · Apr 15, 2025
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Viet Phan
And you wonder why AAPL spiked on friday evening.
Big gap up on monday. https://t.co/Ntt1zB3hy1
3:50 PM · Apr 12, 2025
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Viet Phan
Don’t skip engineering class.
The guy next to you might be knee-deep in the Nuclear Phynance forum, reverse-engineering retirement at 30 with fixed income strategies.
(True story. Restarting 10 years later, I still think that guy was onto something) https://t.co/I1llpwMyEa
12:16 PM · Apr 11, 2025
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Viet Phan
Domino’s Pizza survived the 2008 crash.
But 2024’s $5.3B debt and cheese tariffs?
It’s Taco Bell 2008.
Or a debt meltdown.
The haunting data charts won’t tell you (but every investor needs to see)
Check my Substack for full analysis. https://t.co/RRmR5IpQWh
3:00 PM · Apr 7, 2025
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Viet Phan
In worst case scenario FED has no choice but to cut rates.
Today’s fail-safe: SP500 circuit breakers!
Level 1: 7% intraday. Pause for 15 minutes.
Level 2: 13% intraday. Pause for 15 minutes.
Level 3: 20% intraday. Pause for rest of the day. https://t.co/wTMH25ApCt
10:02 AM · Apr 7, 2025
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Viet Phan
I still wonder which hedge fund blew up on Friday…
When even gold, the safe haven gets dumped to cover margin calls. Like 2008 banks dumping Treasuries.
Funds sell stocks → prices drop → more margin calls → repeat
This doesn't feel like a “buy the dip” moment. https://t.co/CANlr18XAJ
3:50 PM · Apr 6, 2025
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