Guide
A Valuation Percentile Can Move Without a Price Move
A percentile is a rank within a moving historical window. Learn why it can shift even when a stock price barely changes.
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Guides on ETF comparisons, cross-listing analysis, ADRs, CDIs, and comparing stocks across exchanges.
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Zscaler Sits at the 14th Percentile of Its Own Range While Cyber Rallied
As of October 5, 2026, Zscaler trades at 9.9 times trailing sales, the 14th percentile of its own five-year range, with revenue up 25%. What changed in May, what the market is worried about, and how to check it yourself.
Read more →Guide
EV/Sales vs P/S: Why the Same Stock Can Look Cheaper on One Chart
P/S and EV/Sales use the same revenue denominator but different measures of value. Work through the debt and cash math before comparing the two.
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AI Agents Need Logins Too: Okta, SailPoint, and the Identity Buyout Wave
Every AI agent runs on credentials and permissions, which makes identity security the most direct way to sell into the agent wave. How non-human identity works, who bought whom in 2025 and 2026, and where Okta and SailPoint sit on valuation.
Read more →Guide
Negative EBITDA: When EV/EBITDA Stops Being a Useful Shortcut
A negative EBITDA denominator makes the usual EV/EBITDA ranking hard to interpret. Here is a better research sequence.
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AI Cybersecurity Stocks: The Trade Is Priced. Mostly.
We ranked 28 cybersecurity stocks against their own five-year EV/Sales history as of October 5, 2026. The big platforms sit at the 96th to 98th percentile. Four names still growing revenue 10% or more sit below the 40th, led by Zscaler.
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Friedberg Says Cyber Budgets Will Go Through the Roof. The Stocks Already Did.
On All-In #291, David Friedberg argued that AI agents will set off a cyber defense arms race. We checked where the security stocks sit in their own five-year valuation ranges: the biggest platforms are already at the 96th to 98th percentile.
Read more →Guide
Why a Stock Split Should Not Change a Company’s P/E
Stock splits change per-share prices and earnings, but not the underlying valuation by themselves. Work through the math and chart checks.
Read more →Guide
Price-to-Sales After an Acquisition: A Denominator Trap
An acquisition can move price-to-sales before the new revenue is fully reported. Learn to align the valuation date with the revenue period.
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Trailing P/E vs Forward P/E: Check the Denominator First
Trailing and forward P/E ratios use different earnings. Here is how to keep the dates, estimates, and business assumptions straight.
Read more →Product
Saved Stock Baskets: The Research Workflow Before a Watchlist
How to organize stock research with saved baskets: peer sets, thesis lists, valuation screens, and cross-listing checks before a trade decision.
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EV/EBITDA vs P/E: Which Valuation Multiple Should You Use First?
How to choose between EV/EBITDA and P/E when screening stocks, including debt, taxes, cyclicality, and capital intensity.
Read more →Guide
How to Use Valuation Percentiles Without Fooling Yourself
A practical guide to reading valuation percentiles: what bottom-quartile actually means, when it is useful, and when it is a value trap.
Read more →research-workflows
Best ADR and CDI Research Workflow in 2026
A practical workflow for comparing ADRs, CDIs, ordinary shares, currency, liquidity, fees, and valuation context before investing.
Read more →cross-listings
ADR Fees, Dividends, and Tax: Investor Checklist
What retail investors should check before buying an ADR, including depositary fees, dividend withholding, custody, and broker FX costs.
Read more →market-structure
Dual-Listed Stock News Reaction Windows
How market-hours gaps can make one listing react before another, and how retail investors should read dual-listed stock news moves.
Read more →Market Analysis
Gavin Baker's 'No Negative Quantitative Metric': the Checklist Version
During the worst week of the July 2026 AI selloff, Gavin Baker said he could not find a single negative quantitative metric. That is a checkable claim. Here is the checklist: every metric he cited, what it signals, and an honest accounting of which ones a retail investor can actually verify.
Read more →Valuation
Nvidia at Its Lowest Forward P/E in a Decade: What That Number Actually Means
After the July 2026 selloff, Nvidia traded at its cheapest forward P/E in ten years. That sentence contains one number and three assumptions. Here is how to unpack it: forward vs. trailing, what multiple compression on accelerating earnings mathematically implies, and why "cheapest in a decade" has been both a great signal and a trap.
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Everyone Says AI Stocks Are On Sale. Our Data Says Five Are.
July 2026 took 40–60% off AI infrastructure stocks. We ranked 50 names against their own five-year valuation history: only five actually got cheap, and about a third of the complex still trades near five-year-high multiples.
Read more →Product
StockResearch Is Now a Valuation Research Platform
StockResearch now charts any covered stock's valuation against its own five-year history: a percentile screener with presets and a valuation-vs-growth chart view, per-ticker research hubs, and an S&P 500 valuation history page, all computed from SEC EDGAR filings.
Read more →Market Analysis
Forced Selling vs. Fundamentals: How to Tell a Positioning Event From an Information Event
Every big drawdown is one of two things: the market learned something, or someone had to sell. They look identical on a price chart. Here are five data checks that separate them, illustrated with the July 2026 AI selloff.
Read more →Market Analysis
The Situational Awareness Implosion, Explained With Data
A concentrated AI fund went from +439% to selling its entire book to Citadel in six trading days. The July 30 tape, where stocks the fund never owned bounced as hard as the ones it dumped, is some of the cleanest public data on forced selling you will ever see.
Read more →cross-listings
ASX CDI Spreads Explained for Retail Investors
A plain-English guide to ASX CDI spreads, currency conversion, market-hours gaps, liquidity, and why discounts are not always tradable.
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ADR Ratio Mistakes Retail Investors Make
How ADR ratios change cross-listing comparisons, why a cheap-looking ADR can be misleading, and the checklist to use before buying.
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CDI vs Ordinary Shares: Investor Checklist Before You Buy
A practical checklist for comparing CDIs and ordinary shares, including ratios, currency, liquidity, dividends, custody, and trading costs.
Read more →Cross-Listing
Best ADR and Dual-Listed Stock Research Tools in 2026
An honest comparison of tools investors use to research ADRs, CDIs, ordinary shares, FX, and dual-listed stock spreads.
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How to Read an ADR Premium or Discount Without Fooling Yourself
ADR premiums and discounts are useful only when the math is normalized. Learn the mistakes that create false signals.
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ADR vs Local Shares Before Earnings: How to Compare the Real Price
Earnings weeks can make ADR and local-share prices look disconnected. Here is how to compare the real spread before reacting.
Read more →Cross-Listing
Dual-Listed Stock Spread Alerts: What Actually Deserves Attention
Not every cross-listing spread is actionable. Learn which dual-listed stock gaps are timing noise, fee noise, or worth a closer look.
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How to Compare ADR Fees Before Buying a Foreign Stock
ADR custody fees are small but real. Here is how to find them, compare them with ordinary shares, and decide whether convenience is worth the drag.
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Rio Tinto ADR vs London and ASX Shares: Which Price Should You Trust?
Rio Tinto trades across major markets. Here is how to normalize ADR, London, and ASX prices before drawing conclusions.
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BHP ADR vs ASX Shares: Comparing a Global Miner Across Markets
How to compare BHP ADRs and ASX ordinary shares without getting fooled by FX, ratio, dividend timing, or market hours.
Read more →ADR Education
ADR Ratio Changes: What Investors Should Check First
ADR ratio changes can make charts and prices look strange. Here is the investor checklist before comparing old and new prices.
Read more →Cross-Listing
Block Inc ASX vs NYSE: How to Compare SQ2 and XYZ
A practical guide to comparing Block shares across the ASX and NYSE after adjusting for currency, ratio, liquidity, and market hours.
Read more →Cross-Listing
How to Track Dual-Listed Stock Spreads Over Time
A practical framework for turning one-off ADR or CDI price gaps into a cleaner historical spread view.
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ADR vs Local Shares: A Pre-Trade Checklist for Retail Investors
Before buying an ADR or the local share line, check ratio, currency, liquidity, fees, tax handling, and market-hour timing.
Read more →Cross-Listing
CDI Ratio Changes: What Investors Should Check Before Comparing Prices
A practical checklist for handling CDI ratio changes, share splits, and depositary adjustments when comparing ASX CDIs with ordinary shares.
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ADR Premiums After Earnings: How to Read the First Market Move
Earnings can open a temporary gap between an ADR, CDI, or ordinary share line. Here is how to separate stale pricing from a real market signal.
Read more →Cross-Listings
How to Compare ASX CDIs With U.S. Ordinary Shares
A practical guide to comparing ASX CDIs, U.S. ordinary shares, and ADR-style listings without mixing currencies, ratios, or stale market hours.
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ADR Arbitrage Is Not Free Money: The Frictions Investors Miss
ADR premiums and discounts can look like obvious arbitrage. Here are the costs, timing gaps, taxes, and liquidity issues that make the trade harder than the chart suggests.
Read more →Valuation
How to Build a Stock Valuation Workbench Instead of a One-Off Chart
A practical workflow for comparing valuation scenarios, peer sets, and historical multiples without rebuilding the same spreadsheet every time.
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How to Use Historical Valuation Multiples Without Overfitting
Historical P/E, P/S, P/B, EV/Revenue, and EV/EBITDA charts can make valuation research much clearer, but only if you avoid the most common traps.
Read more →Cross-Listing
Life360 ASX vs NASDAQ: How to Read the Cross-Listing Spread
Life360 is a useful real-world example of how CDIs and US-listed shares can trade at different effective prices. Here is how to read the spread without overreacting.
Read more →Cross-Listing
Free Tools for Cross-Listing Analysis in 2026
A practical look at free tools investors can use to compare ADRs, CDIs, ordinary shares, FX moves, valuation multiples, and cross-listing spreads.
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CDI vs Ordinary Shares on the ASX: A Guide for Australian Investors
CDIs let Australian investors trade overseas companies on the ASX, but they are not always the same as holding ordinary shares directly. Here is what to compare.
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Why ADR Prices Differ from Home-Market Shares
ADR prices can diverge from ordinary shares for good reasons. Here are the structural drivers investors should check before calling it an arbitrage.
Read more →Cross-Listing
How to Compare Dual-Listed Stock Prices Without Fooling Yourself
A practical checklist for comparing dual-listed stocks across exchanges, including currency conversion, ADR and CDI ratios, stale prices, liquidity, and trading costs.
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Is It Cheaper to Buy the ADR or the Ordinary Shares? Here's How to Check
When a company is listed on both a US exchange and its home market, the ADR and ordinary shares rarely trade at the same price. Here's how to compare them properly — and when the difference actually matters.
Read more →Cross-Listing
ADR Premium and Discount: What Investors Need to Know
ADRs rarely trade at the same price as their underlying foreign shares. Understanding why ADRs trade at a premium or discount — and what drives the spread — is essential context for any cross-listing investor.
Read more →Cross-Listing
The Complete Guide to Cross-Exchange Stock Comparison Tools
A comprehensive overview of tools, methodologies, and frameworks for comparing stocks across different exchanges — from free retail options to institutional platforms.
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StockResearch vs TradingView for Cross-Listing Analysis
TradingView is great for charting. But for cross-listing analysis — adjusting for depositary ratios, converting currencies, and tracking spreads between two exchanges — it falls short. Here's how the tools compare.
Read more →ETF Comparison
FXAIX vs VOO: Fidelity vs Vanguard for S&P 500 Investors
Both FXAIX and VOO track the S&P 500, but FXAIX is actually cheaper. The catch: it is a mutual fund, not an ETF. Here is when each makes sense and why your brokerage matters.
Read more →Valuation
Stock Valuation 101: Which Multiple Should You Use?
P/E, P/S, P/B, EV/Revenue, EV/EBITDA: there are a lot of valuation multiples. This guide explains when each one works, when it breaks down, and how to pick the right one for any stock.
Read more →ETF Comparison
QQQ vs QQQM: Same Nasdaq 100, Different Cost
QQQ and QQQM track the exact same index. QQQM is cheaper. QQQ has more liquidity. Here is when each one makes sense, and which you should probably own.
Read more →Cross-Listing
QSBS Eligibility for Cross-Listed Stocks: A Tax Guide
Qualified Small Business Stock (QSBS) can offer significant capital gains exclusions, but cross-listed stocks add complexity. Here's what investors need to know about QSBS eligibility when a company trades on multiple exchanges.
Read more →ETF Comparison
SCHD vs VYM: Which Dividend ETF Is Worth Owning?
SCHD screens for quality and dividend growth. VYM casts a wider net. Both yield more than the S&P 500. But they take very different approaches, and the performance gap over the past five years has been notable.
Read more →ETF Comparison
VT vs VTI: One Fund Portfolio vs Two Fund Portfolio
VT gives you the entire world in a single ETF. VTI gives you the US only, meant to be paired with VXUS for international exposure. Which approach actually makes more sense?
Read more →Valuation
P/S Ratio: The Valuation Metric That Works When P/E Does Not
For unprofitable growth companies, P/E is meaningless. The price-to-sales ratio fills the gap. Here is when to use it, how to interpret it, and where it breaks down.
Read more →Cross-Listing
Dual-Listed Stocks: Arbitrage Opportunities and How to Spot Them
Dual-listed stocks sometimes trade at significant spreads across exchanges. Here's when those spreads represent genuine arbitrage opportunities, when they don't, and how to tell the difference.
Read more →ETF Comparison
VOO vs QQQ: Broad Market or Tech-Heavy?
VOO gives you 500 large-cap US companies. QQQ gives you 100 Nasdaq stocks with a massive tech tilt. One is diversified. The other has been spectacular. The question is whether that continues.
Read more →ETF Comparison
VTI vs VXUS: The Boglehead Two-Fund Portfolio Explained
VTI covers the entire US market. VXUS covers everything else. Together, they give you the whole world. But is international diversification worth it after 15 years of US outperformance?
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How to Chart Historical P/E Ratios for Any Stock (Free)
Most P/E charts show quarterly snapshots. StockResearch computes daily P/E ratios from real-time prices and trailing earnings, giving you a smooth valuation history for any stock.
Read more →ETF Comparison
SPY vs VOO: The S&P 500 ETF Showdown
SPY and VOO track the exact same index. So why does one cost three times more than the other? And which one should you actually buy?
Read more →Cross-Listing
How to Calculate ADR Premium and Discount in Real Time
A step-by-step guide to calculating the premium or discount between an ADR and its underlying foreign shares, including the formula, common pitfalls, and how to monitor spreads in real time.
Read more →ETF Comparison
VOO vs VTI: Which Vanguard ETF Should You Own?
VOO tracks the S&P 500. VTI tracks the entire US market. Both cost 0.03%. So which one should you actually own? The answer is probably simpler than you think.
Read more →Cross-Listing
Cross-Listing Analysis: Comparing Dual-Listed Stocks Across Exchanges
How to properly compare a stock that trades on two exchanges simultaneously — adjusting for currency, depositary ratios, and trading hour gaps to identify meaningful price divergences.
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Life360 CDI vs NYSE Shares: What Investors Need to Know
Life360 trades on both NASDAQ (LIF) and the ASX (360.AX) as CDIs. Here's a practical breakdown of the spread, how to compare the two prices fairly, and what drives the premium or discount.
Read more →Cross-Listing
What Is a CDI? Understanding CHESS Depositary Interests for US Investors
CHESS Depositary Interests let Australian investors trade foreign stocks on the ASX without holding shares directly. Here's how CDIs work, how they differ from ADRs, and what US investors need to know.
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