Value Investing Resources
Everything you need to invest like the pros — all free
Value investing isn't complicated, but it takes the right resources. The best investors in history — Buffett, Munger, Marks, Klarman — all built their skills by reading voraciously: company filings, investor letters, books, and research from other thoughtful investors.
RhinoInvestory exists to make that process easier. We curate the best investing newsletters, aggregate independent stock analysis, maintain a library of hedge fund letters, and build free tools that help you make better decisions. This page is your starting point: every resource on our site, organized by category, with context on how to use each one.
Stock Analysis & Research
Deep-dive analysis from independent analysts
Most stock analysis online comes from sell-side banks with inherent conflicts of interest. We curate research from independent Substack analysts and value-focused writers who publish detailed, long-form analysis on individual companies. Browse by company, sector, country, or analyst to find the research that matters to your portfolio.
By Company
Find every analysis published on a specific company, aggregated from dozens of independent analysts
By Sector
Browse analysis organized by industry — from technology and healthcare to energy and financials
By Analyst
Discover independent analysts whose research style matches your investing approach
By Country
Find analysis on international companies organized by geography
By Ticker
Look up a specific ticker symbol to see all published analysis
Investing Newsletters
Curated list of the best investing newsletters
Email newsletters have become one of the best sources of investing insight. The best ones offer institutional-quality analysis for free (or at a fraction of what research subscriptions cost). We maintain a curated directory of the top investing newsletters, filtering for quality, originality, and genuine analytical value — not just market commentary.
Top Rated Newsletters
Our hand-picked selections — newsletters we actually read ourselves and recommend
Free Newsletters
Excellent analysis that costs nothing — the best value in investing education
Hedge Fund & Investor Letters
Learn directly from legendary fund managers
Reading shareholder letters from great investors is the closest thing to a free investing education. Warren Buffett, Howard Marks, Seth Klarman, Bill Ackman, and dozens of other top fund managers publish letters that explain their thinking, their mistakes, and their process. We curate both a browsable collection of current letters and an editorial guide to the most famous investor letters of all time.
Famous Investor Letters Guide
In-depth profiles of 8 legendary investors with must-read letter recommendations for each
Full Letter Collection
Dozens of hedge fund letters organized by fund, updated as new letters are published
Investing Books
The books that shaped value investing
Some books have stood the test of time because the principles they teach are timeless. From Benjamin Graham's 'The Intelligent Investor' to Howard Marks' 'The Most Important Thing,' the best investing books teach frameworks for thinking about markets, businesses, and risk that remain relevant across every market cycle. We curate a collection organized by topic and difficulty level.
Browse All BooksInvesting Podcasts
Learn while you commute
Podcasts have become an essential learning tool for investors. The best ones feature long-form conversations with fund managers, CEOs, and analysts that you'd never get access to otherwise. Our curated list covers everything from value investing deep-dives to macro analysis and founder interviews.
Browse All PodcastsFree Financial Calculators
Tools for making better investment decisions
Good investing requires good math. Our free calculators help you model compound growth, estimate intrinsic value, size positions properly, and understand the power of reinvested dividends. Every tool is designed with value investors in mind — no account required, no paywalls.
DCF Calculator
Estimate the intrinsic value of a business using discounted cash flow analysis
Compound Interest Calculator
Visualize how your investments grow over time with the power of compounding
CAGR Calculator
Calculate the compound annual growth rate of any investment
Position Size Calculator
Determine the right position size based on your risk tolerance and portfolio size
Dividend Reinvestment Calculator
Model the long-term impact of reinvesting dividends vs. taking cash
Rule of 72 Calculator
Quickly estimate how long it takes to double your money at a given return rate
Stock Profit Calculator
Calculate your profit, return percentage, and annualized return on any trade
How to Use These Resources
If You're Just Starting
Start with our Famous Investor Letters guide to learn how the best investors think. Subscribe to 2-3 newsletters to see real-time analysis. Practice valuation with the DCF calculator.
If You're Researching a Stock
Search our stock analysis database by company or ticker for independent research. Use the DCF calculator for your own valuation. Check if any hedge fund letters discuss the company.
If You're Building a Process
Study investor letters to build mental models. Browse investing books for deeper frameworks. Use the position size calculator to formalize your risk management.