External Resources
Your Curated Library of Trusted Investment Knowledge
We've gathered the most authoritative, research-backed resources from academia, government agencies, and industry leaders. These aren't random links — they're the same sources financial professionals rely on.
www.PlainAndSimpleInvesting.com
Why We Curate External Resources
Good investing decisions are built on good information. We've handpicked resources that meet our standards for accuracy, objectivity, and beginner-friendliness. These are sources you can trust.
Vetted & Verified
Every resource is from a reputable institution or regulatory body
Research-Backed
Based on peer-reviewed studies and historical data
No Hidden Agendas
We prioritize educational resources over sales pitches
Beginner-Friendly
Selected with new investors in mind
Academic Research & Landmark Studies
The foundational research that shapes how we understand long-term investing. These peer-reviewed studies have stood the test of time and informed investment strategies for decades.
The Trinity Study (1998 & Updates)
Landmark StudyThe cornerstone of retirement planning research. This groundbreaking study analyzed historical market data to determine "safe withdrawal rates" — how much you can withdraw from your retirement portfolio each year without running out of money.
Key Findings:
- • The famous "4% Rule" originated from this research
- • A diversified portfolio historically sustained 30-year withdrawals at 4% annual rate
- • Asset allocation significantly impacts portfolio longevity
- • Updated versions continue to validate core findings with new data
Fama & French Research
Nobel Prize WinnersEugene Fama and Kenneth French revolutionized our understanding of what drives investment returns. Their multi-factor model expanded beyond simple market risk to explain why some stocks outperform others over time.
Key Findings:
- • Market Beta: Stocks are riskier than bonds, so they return more over time
- • Size Factor: Small-cap stocks tend to outperform large-caps historically
- • Value Factor: "Value" stocks (low price-to-book) have historically beaten "growth" stocks
- • Their work is the foundation of modern "factor investing"
DALBAR Quantitative Analysis of Investor Behavior (QAIB)
Behavioral FinanceThis annual study reveals an uncomfortable truth: the average investor significantly underperforms the market — not because of bad stock picks, but because of poor timing decisions driven by emotions.
Key Findings:
- • Average equity investor returns lag the S&P 500 by 3-4% annually over 20+ years
- • Investors buy high (after gains) and sell low (during panic)
- • The "behavior gap" costs more than fees or fund selection
- • Staying invested beats trying to time the market
This is why we emphasize "boring" strategies like dollar-cost averaging and staying the course during downturns.
John Bogle's Research on Costs & Index Investing
Vanguard FounderThe late John Bogle, founder of Vanguard, dedicated his career to proving that costs matter enormously in investing. His research demonstrated why low-cost index funds outperform most actively managed funds over time.
Key Findings:
- • The average actively managed fund underperforms its benchmark index after fees
- • A 1% annual fee can reduce your ending wealth by 25%+ over 30 years
- • Past fund performance does not predict future results
- • "Don't look for the needle; buy the haystack" — own the whole market
ETF & Mutual Fund Data Sources
Where to research funds before you invest. These resources help you understand fees, holdings, performance, and risks of any ETF or mutual fund.
SEC EDGAR - Official ETF & Fund Filings
The Securities and Exchange Commission requires all investment funds to file detailed disclosures. EDGAR is where you'll find the official, legally-binding documents that tell you exactly what a fund does, what it costs, and what risks it carries.
What You'll Find:
- • Prospectus: Complete fund details and fees
- • Annual Reports: Performance and holdings
- • N-PORT Filings: Monthly portfolio holdings
Why It Matters:
- • Know the true expense ratio
- • Understand what's actually in the fund
- • Read risk disclosures in plain language
Vanguard Research & ETF Information
Vanguard pioneered low-cost index investing and remains a leader in investor education. Their research center publishes high-quality studies on asset allocation, retirement planning, and market behavior — all free to access.
Recommended Resources:
- • Vanguard's Principles for Investing Success: Their foundational investing philosophy
- • How America Saves: Annual retirement plan research study
- • ETF Product Pages: Detailed fund information with cost comparisons
- • Portfolio Allocation Models: Sample portfolios by risk level
Fidelity Learning Center
Fidelity offers one of the most comprehensive free educational libraries in the industry. Their Learning Center covers everything from investment basics to advanced portfolio strategies, with articles, videos, and interactive tools.
Recommended Resources:
- • Investing 101: Beginner-friendly tutorials on stocks, bonds, and funds
- • Retirement Planning Tools: Calculators and planning worksheets
- • ETF Screener: Compare funds by cost, performance, and holdings
- • Viewpoints: Market commentary and investing insights
Morningstar Fund Research
Morningstar is the gold standard for independent fund analysis. Their famous star ratings, analyst reports, and comprehensive data help investors compare thousands of mutual funds and ETFs objectively.
What Morningstar Offers:
- • Star Ratings: 1-5 star system based on risk-adjusted returns
- • Analyst Reports: In-depth fund reviews by professional researchers
- • X-Ray Tool: See what's really inside your portfolio
- • Cost Comparison: Fee analysis across similar funds
Note: Basic research is free; premium features require a subscription.
Government & Regulatory Resources
Official sources for tax rules, investor protection, and fraud prevention. These are the authoritative references that even financial professionals rely on.
IRS Retirement Plans Information
The official source for everything related to retirement account rules, contribution limits, and tax treatment. When you need to know the exact rules for IRAs, 401(k)s, or other retirement accounts, the IRS is the authoritative source.
Key Information Available:
- • Contribution Limits: Annual maximums for IRAs, 401(k)s, HSAs
- • Withdrawal Rules: When and how you can access retirement funds
- • Required Minimum Distributions: Rules for when you must withdraw
- • Roth Conversion Rules: How to convert Traditional to Roth accounts
- • Early Withdrawal Penalties: Exceptions and how to avoid them
FINRA Investor Education
The Financial Industry Regulatory Authority (FINRA) protects investors by regulating brokerage firms. Their investor education section includes tools to verify your broker's credentials and spot potential scams.
BrokerCheck
Free tool to research the background of financial brokers and advisors. See their qualifications, employment history, and any disciplinary actions.
Scam Alerts
Stay informed about current investment fraud schemes and learn the warning signs of scams.
SEC Investor.gov
The Securities and Exchange Commission's official investor education website. A treasure trove of beginner-friendly explanations of investment products, how markets work, and how to protect yourself from fraud.
Highly Recommended Sections:
- • Introduction to Investing: Clear explanations of stocks, bonds, mutual funds, and ETFs
- • Compound Interest Calculator: See how your money grows over time
- • Investment Fraud: How to spot Ponzi schemes, pump-and-dump, and other scams
- • Ask Questions: What to ask before choosing a financial professional
Social Security Administration
Understanding Social Security is essential for retirement planning. The SSA website lets you estimate your future benefits, understand when to claim, and create a comprehensive retirement income strategy.
Key Tools:
- • my Social Security: Create an account to view your estimated benefits
- • Retirement Estimator: Calculate benefits based on different claiming ages
- • Full Retirement Age Calculator: Know when you can claim full benefits
Market Data & Historical Performance
Access the same market data that professional investors use. Understanding historical market performance helps set realistic expectations for your investments.
S&P Dow Jones Indices
The official source for S&P 500, Dow Jones Industrial Average, and hundreds of other market indices. Their research section includes SPIVA reports, which compare how actively managed funds perform against their benchmark indices.
SPIVA Scorecard (Must-Read):
The SPIVA (S&P Indices Versus Active) scorecard tracks how many actively managed funds beat their benchmark. Spoiler: most don't. This data supports the case for low-cost index investing.
FRED (Federal Reserve Economic Data)
A free, comprehensive database of economic data from the Federal Reserve Bank of St. Louis. Track inflation rates, interest rates, unemployment, GDP growth, and hundreds of other economic indicators.
Useful for Understanding:
- • Historical inflation rates (CPI data)
- • Interest rate trends (Fed funds rate, Treasury yields)
- • Market valuations (Shiller PE ratio)
- • Economic cycles and their impact on markets
Portfolio Visualizer
A powerful (and free) backtesting tool that lets you see how different portfolio allocations would have performed historically. Test strategies before implementing them with real money.
Popular Tools:
- • Backtest Portfolio: Compare historical performance of different allocations
- • Monte Carlo Simulation: Stress-test retirement withdrawal strategies
- • Asset Correlation: Understand how different investments move together
- • Factor Analysis: See what drives your portfolio's returns
Educational Content & Communities
Continue your investing education with these trusted resources. From communities of like-minded investors to insightful podcasts and books, these resources will deepen your knowledge.
Bogleheads Community
Highly RecommendedNamed after Vanguard founder John Bogle, this community of investors follows the principles of low-cost, passive index investing. Their wiki is an incredible free resource, and the forum is full of helpful, experienced investors who answer questions patiently.
Why We Love Them:
- • Bogleheads Wiki: Comprehensive investing knowledge base
- • Three-Fund Portfolio: Their signature simple investing approach
- • Forum Community: Get questions answered by experienced investors
- • No Sales Pitch: Pure education, no products to sell
Investopedia
The go-to dictionary for investing terminology. When you encounter a term you don't understand, Investopedia usually has a clear, beginner-friendly explanation with examples.
Best Uses:
- • Financial Dictionary: Clear definitions of any investing term
- • How-To Guides: Step-by-step explanations of concepts
- • Simulator: Practice trading with fake money
Note: Some content is advertising-supported. Focus on educational articles rather than product recommendations.
Reddit Personal Finance Communities
Reddit hosts several active communities focused on personal finance and investing. While you should always verify advice from anonymous sources, these communities can provide helpful perspectives and support from people in similar situations.
r/personalfinance
General personal finance questions, budgeting, debt management, and investing basics.
r/Bogleheads
Discussion of passive index investing following Boglehead principles.
r/investingforbeginners
A place for those who are just starting out in investing and the stock market to get their questions answered.
r/ValueInvesting
A place for Value investing in all its forms - From Graham & Dodd, to Buffett & Munger.
Caution: Always verify information from anonymous sources. The wiki/FAQ sections of these communities are generally well-vetted; individual comments may not be.
Top Rated ETF Investing YouTubers
Trusted voices focused on long-term, passive ETF investing and financial discipline.
Ben Felix
Evidence-based investing, factor ETFs, and long-term portfolio construction.
The Plain Bagel
Clear explanations of ETFs, market behavior, and long-term investing risks.
Optimized Portfolio
Deep dives into ETF portfolios, diversification, and risk-adjusted returns.
Rob Berger
Simple ETF investing, retirement planning, and low-cost strategies.
PensionCraft
Portfolio construction, asset allocation, and long-term ETF frameworks.
The Money Guy Show
Financial order of operations and ETF-based long-term wealth building.
Humphrey Yang
Beginner-friendly ETF investing, personal finance, and money habits.
Two Cents
Educational breakdowns of investing basics and long-term wealth concepts.
Minority Mindset
ETF investing, financial discipline, and long-term wealth mindset.
Next Level Life
Index funds, ETF investing, and long-term wealth strategies.
Andrei Jikh
ETF investing and disciplined portfolio building.
Money Evolution
ETF investing, FIRE concepts, and long-term strategy.
Learn to Invest
ETF basics and beginner-friendly investing education.
Our Rich Journey
Long-term investing and ETF-based FIRE journey.
Top Rated ETF Investing Websites
Trusted, long-term focused resources for ETF investing, portfolio construction, and evidence-based finance.
Bogleheads
Gold standard for low-cost, passive ETF and index investing education.
Investopedia
Clear explanations of ETFs, investing concepts, and financial fundamentals.
Morningstar
Independent ETF analysis, ratings, portfolio research, and asset allocation tools.
ETF.com
ETF-specific news, comparisons, and educational resources.
Portfolio Visualizer
Backtesting and portfolio analysis tools for long-term ETF strategies.
White Coat Investor
Practical ETF and index investing guidance with a strong long-term focus.
NerdWallet
Beginner-friendly ETF investing guides and financial planning resources.
Fidelity Learning Center
High-quality ETF, index fund, and long-term investing education.
Vanguard Education
Investor education from the leader in low-cost ETFs and index funds.
Charles Schwab Learning
ETF investing basics, asset allocation, and long-term planning content.
The Balance
Simple explanations of ETFs, investing, and personal finance fundamentals.
Money Under 30
Long-term ETF investing and financial habits for younger investors.
The Simple Path to Wealth
JL Collins’ philosophy on index funds and financial independence.
Mr. Money Mustache
ETF-based investing principles tied to financial independence and frugality.
Financial Samurai
Long-term investing, asset allocation, and risk management insights.
Bankrate
ETF investing basics, comparisons, and long-term planning tools.
Kitces
Deep, evidence-based investing research relevant to ETF strategies.
Brew Markets
Easy-to-digest financial news with ETF and market context.
CNBC Investing
Market coverage and ETF-related investing insights.
SEC Investor.gov
Official investor education on ETFs, risk, and long-term investing.
📚 Essential Reading List
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Important Disclaimer About External Resources
Third-Party Content: The external resources listed on this page are provided for educational purposes only. Plain & Simple Investing does not control, endorse, or guarantee the accuracy of content on third-party websites.
Not Financial Advice: This page and the linked resources are for informational purposes only and should not be considered financial, investment, tax, or legal advice. Always consult with qualified professionals for advice specific to your situation.
Do Your Own Research: We encourage you to verify information from multiple sources and consider how it applies to your unique circumstances before making any financial decisions.
Links May Change: External websites may update their content or URLs. If you find a broken link, please let us know so we can update it.
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