About Us

About Harin's Stock Express

Hi, I'm Harin — an independent quantitative researcher and the sole writer behind Harin's Stock Express. I got hooked on data-driven investing in college, when I started building small statistical models to check whether the market stories I kept hearing actually held up in the numbers. Most of them didn't. That habit grew into a full research pipeline, and this blog is where I publish what it finds.

Everything here is written by me: I run the models, read the filings, build the charts, and take responsibility for the mistakes. I'm not a licensed financial adviser, and nothing on this site is personalized investment advice — it is independent research, published so you can check my work.

What this site covers

  • Quantitative fair-value reports on large-cap US stocks (NVDA, MSFT, GOOGL, AMZN, MU, INTC and others), built around earnings-based payback-period analysis.
  • 3x leveraged ETF research (SOXL and peers): volatility drag, decay math, and when leverage is — and isn't — survivable.
  • Macro and event analysis — Fed policy, semiconductor cycles, earnings season — always through a quantitative lens rather than narrative.
  • Research diary posts where I document what my models got wrong and what I changed afterwards.

How every analysis is made

  1. Data collection. Company fundamentals from SEC filings (10-K/10-Q) and official earnings releases, plus daily price and volume history for each ticker covered.
  2. Modeling. The core tool is a payback-period valuation: how many years of earnings, at consensus growth rates, it would take to "pay back" today's share price. Momentum, value, and volatility-regime signals supplement it.
  3. Backtesting and sanity checks. Signals are tested against historical data before they appear in a post. When a model fails out of sample, I say so in the open — see the research diary posts.
  4. Risk framing. Ideas are presented with maximum-drawdown and volatility assumptions, never just an upside target.

Figures in each post are as of the publication date shown on that post and are not silently updated afterwards; material errors are corrected with a visible note.

Independence and corrections

This site has no sponsors, accepts no payment for coverage, and has no relationship with any company mentioned. If you spot an error — in data, math, or reasoning — please email me and I will review and correct it.

Contact

Questions, feedback, corrections, or business inquiries: see the Contact page or email luxjy86@gmail.com. I usually reply within 2–3 business days.

Disclaimer: The content on this site is for educational and informational purposes only and does not constitute financial or investment advice. Markets involve risk, including loss of principal. Please do your own research before making any financial decision — full details on the Disclaimer page.

Disclaimer: Educational content only — not financial advice. Read the full Disclaimer.

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