Skip to content
Matias Zarembka
Menu

Finance

How I think about businesses, valuation, portfolios and risk

This isn't a stock-picking feed. It's where I document the process: how I analyze a company, how I construct and rebalance a portfolio, how I size and exit defined-risk trades, and how I build systematic research tools.
  1. 01

    Investment research

    Company analysis built around business model, financials, competition, valuation and risk, with every figure dated.

    Latest: D-Wave Quantum (QBTS), September 26, 2026

    1 published
  2. 02

    Financial modeling

    DCF, comparable-company and three-statement work, published only with the underlying model or notes.

    Wall Street Prep financial modeling & valuation: in progress

    In progress
  3. 03

    Long-term portfolio

    Eight holdings with written target weights, allowed ranges and a rationale for each, across taxable and Roth accounts.

    8 holdings · percentages only · as of October 14, 2026

    Active
  4. 04

    Defined-risk options

    A journal of vertical spreads: chart-first setups, defined max loss, planned invalidation. Small sample, reported in full.

    Realized +$781 (gain)14 closed spreads50% win rateThrough Oct 9, 2026

    Active
  5. 05

    Quantitative research

    Quantis, a systematic equity research system with an AI research step and a hard-coded risk gate, and QuantisSport, a multi-sport probability-modeling platform.

    Quantis · QuantisSport

    2 projects