Porfie Blog

Vibe quant, backtest and more journeys

Short, friendly pieces about turning investing intuitions into things you can actually test on real data.

Strategy Guide
Backtest a mean-reversion strategy with plain language

One of investing's oldest intuitions — "what goes down tends to come back up" — is surprisingly testable. Type the rule the way you'd describe it to a colleague: RSI threshold, a trend filter, a minimum hold. Watch it backtest on two real portfolios over 7 years.

⏱ 9 min read · May 2026 · RSI + trend filter · Portfolio comparison
Vibe Quant
What is vibe quant? Investing ideas you can actually play with

Probably you have some intriguing ideas about possible scenarios of how market moves. Most of those hunches live in your mind, never quite tested. Vibe quant is a low-stakes way to give them a spin and see how the intuition plays out.

⏱ 5 min read · May 2026 · Friendly intro