Backtesting, rules-based strategies, market signals, and the mechanics of turning investment ideas into testable processes.

Quantitative & Systematic Investing

52-Week Range: Price Context, Calculation, and Common Misuses

Algorithmic Trading Definition: Rules, Signals & Execution

Backtesting: What Historical Simulations Can and Cannot Prove

Interest rates, monetary policy, volatility, Treasuries, fixed-income pricing and risk, and major macroeconomic forces that shape financial markets.

Markets, Rates & Macro

10-Year Treasury Yield: Price, Yield, Duration, and Market Context

11th District Cost of Funds Index (COFI): History and Replacement

1979 Energy Crisis: Iranian Revolution, Oil Shock, and Market Effects

2011 U.S. Debt Ceiling Crisis: Timeline, Market Effects, and What the Limit Means

30-Year Treasury: Yield, Duration, and Interest-Rate Risk

3P Oil and Gas Reserves: Proved, Probable, Possible, and P90/P50/P10

Bond Convexity: Price-Yield Curvature, Duration Adjustment, and Negative Convexity

Bond Duration: Macaulay Duration, Interest-Rate Risk, and Investment Horizon

Credit Spread: Bond Yield Spreads, Benchmark Risk, and Investor Interpretation

Federal Funds Rate: Definition, Target Range, and Why It Matters

Modified Duration: Bond Price Sensitivity Formula, Examples, and Limits

Monetary Policy: Goals, Tools, and How It Affects the Economy

Option-Adjusted Spread (OAS): Bond Optionality, Models, and Relative Value

Quantitative Easing: Asset Purchases, Reserves, and Financial Conditions

VIX: What the Volatility Index Measures and How It Is Calculated

Yield to Maturity (YTM): Bond Return Assumptions, Formula, and Investor Interpretation

Yield to Worst (YTW): Callable Bond Yield, Assumptions, and Investor Interpretation

Core company-analysis concepts, SEC reports, financial-statement ratios, growth, profitability, pricing and revenue drivers, unit economics, customer economics, recurring revenue, contract activity, platform activity, user engagement and monetization, bank profitability and credit, REIT operating performance and property valuation, insurance underwriting economics, insurer reserve adequacy and loss development, reinsurance economics and risk transfer, life-insurance liability, guarantee, separate-account and acquisition-cost economics, upstream oil and gas reserve economics and unit costs, backlog and future-revenue disclosures, capital structure, segment reporting, expense disaggregation, cost behavior, cost-volume-profit analysis, R&D, internally generated intangibles, software-development accounting, accounting changes, revenue recognition, reporting quality, cash conversion, and valuation ideas used to understand public businesses. The collection also covers insurer asset-liability management, duration mismatch, surrender-driven disintermediation, market-value adjustments, reinvestment risk, net investment spread, modeled catastrophe exposure, catastrophe retention, aggregate catastrophe protection, reinsurance exhaustion, reinstatement economics, airline capacity, passenger traffic, load factor, passenger yield, unit revenue, unit cost, railroad ton-mile workload, freight yield, network fluidity, terminal dwell, railroad operating-ratio economics, utility rate base, authorized utility returns, regulatory lag, fuel-cost recovery, revenue decoupling, weather-normalized utility demand, shipping vessel-day capacity, fleet utilization, TCE revenue, daily vessel operating cost, mining cash cost, all-in sustaining cost, sustaining capital, ore grade, metallurgical recovery, strip-ratio economics, restaurant same-store sales, traffic, average check, average unit volume, restaurant-level margin, restaurant unit-growth economics, hotel RevPAR, ADR, room occupancy, net rooms growth, management fees, franchise-fee economics, telecom postpaid phone additions and churn, postpaid account monetization, device upgrade cycles, fiber/fixed-wireless broadband growth, midstream pipeline throughput, natural-gas gathering/processing, NGL fractionation, minimum-volume commitments, take-or-pay economics, managed-care medical-loss ratios, medical cost trend, premium yield, membership, claims-payment timing, prior-period claims development, payments-network/platform volume, cross-border activity, processed transactions, take-rate economics, client incentives, asset-manager AUM, client flows, fee-bearing assets, effective fee rates, performance-fee economics, homebuilder community count, sales pace, net orders, cancellations, backlog, average selling price, cruise-line capacity, passenger cruise days, occupancy, net yield, net per diem, unit-cost economics, refinery throughput, utilization, product yield, crack-spread benchmarks, realized refining margins, operating unit costs, casino table, slot, and rolling-chip wagering volume and hold economics, auto-dealer vehicle-unit, per-unit gross-profit, F&I, aftersales-margin, and SG&A-efficiency economics, and semiconductor-foundry wafer volume, capacity, utilization, pricing, process-node mix, and manufacturing-yield economics, and upstream oil-and-gas reserve depth, reserve life, production volume and mix, and realized commodity-price economics, and automaker production, deliveries, wholesales, dealer inventory, net pricing, and market-share economics, and commercial-aerospace engine deliveries, installed-base, shop-visit, spare-parts, services-mix, and backlog economics, and corrugated-packaging shipment, containerboard production, inventory, outside-sales, price-and-mix, and mill-outage economics, and equipment-rental fleet cost, utilization, pricing, productivity, and lifecycle economics, and offshore-drilling operating days, rig utilization, dayrates, revenue efficiency, contract backlog, and fleet-status economics, and data-center cabinet utilization, bookings, annualized rent, signed-not-commenced backlog, renewal repricing, and interconnection economics, and self-storage occupancy, move-in and move-out rents, churn, same-store NOI growth, and tenant reinsurance economics, and homebuilder lot control, option deposits, inventory impairments, completed spec inventory, home-sales gross margin, and SG&A leverage economics, and parcel-delivery package volume, operating-day capacity, package yield, freight pounds, freight yield, and fuel-surcharge economics, and railroad train speed, locomotive productivity, train length, workforce productivity, fuel efficiency, and service-performance economics, and restaurant franchising, licensing, digital-sales, and drive-thru-format economics, and regulated-utility customer growth, retail electricity demand, peak load, generation capacity, purchased power, and capital-investment economics.

Company Analysis & Financial Filings

10-K: Annual Filing, Deadlines, and How to Read It

10-Q: Filing Deadlines, Key Sections, and How to Read It

Accident-Year Loss Ratio: Definition and Insurance Underwriting Analysis

Accounting Estimate: Measurement Under Uncertainty

Accounting Policy: The Rules Behind Reported Financial Results

Accruals: Why Accounting Earnings Differ From Cash Flow

Accumulated Depreciation: What It Reveals About Asset Age, Earnings, and Reinvestment

Active Selling Communities: The Homebuilder Distribution Base

Adjusted Funds From Operations (AFFO): Definition and REIT Analysis

Aerospace Services Revenue Mix: Equipment Versus Aftermarket Economics

Aerospace Spare-Parts Volume: Aftermarket Parts Demand Explained

Aggregate Catastrophe Cover: Annual Loss Protection Beyond Single Events

Aggressive Accounting: When Estimates and Policies Favor Current Results

Airline Available Seat Miles per Gallon: Fuel Efficiency per Unit of Capacity

Airline Average Fuel Price per Gallon: Separating Fuel Price from Consumption

Airline Average Stage Length: Measuring Network Haul Length

Airline Block Hours: Measuring Aircraft Operating Activity

Airline Departures: Counting Flight Activity

Airline Fuel Gallons Consumed: Measuring Fuel Volume

Airline Passenger Yield: Revenue per Passenger Mile

All-In Sustaining Cost (AISC): Gold Mining Cost per Ounce

Allowance Coverage Ratio: Definition and Bank Credit Analysis

Allowance for Credit Losses: Definition, CECL, and Bank Analysis

Amortization of Intangible Assets: Useful Lives, Noncash Expense, and Investor Analysis

Annual Recurring Revenue (ARR): What the Run-Rate Metric Really Measures

Asset Age Ratio: Estimating the Age and Remaining Life of PP&E

Asset Turnover Ratio: Formula, Average Assets, and Investor Use

Asset-Liability Management (ALM): Matching Insurer Assets and Obligations

Assets Under Management (AUM): What Asset Managers Actually Manage

Assumed Premiums: Reinsurance Revenue and Risk Taken From Other Insurers

Authorized Return on Equity: Utility ROE, Rate Cases, and Earnings

Automotive Market Share: Automaker Sales Share Explained

Available Seat Miles (ASM): Airline Capacity and Unit Economics

Average Annual Loss (AAL): Catastrophe Risk, Frequency, and Expected Loss

Average Assets Under Management: Why Ending AUM Can Mislead

Average Check: Restaurant Spend per Transaction Explained

Average Daily Rate (ADR): Hotel Room Pricing Explained

Average Rental Fleet: Car Rental Capacity Explained

Average Revenue per User (ARPU): Platform Monetization per Active User

Average Selling Price (ASP): Revenue per Unit and Its Limits

Average Unit Volume (AUV): Restaurant Sales per Location

Backlog: Future Work or Orders That Have Not Yet Become Revenue

Barrel of Oil Equivalent: BOE Conversion, Formula, and Investor Use

Billings: Why Invoicing Can Move Differently From Revenue

Book Value Per Share (BVPS): Formula, Meaning, and Investor Use

Book-Tax Differences: Temporary vs Permanent Differences in Financial Analysis

Bookings: What Signed Contract Activity Says About Future Revenue

Break-Even Point: The Sales Level Where Contribution Covers Fixed Costs

Buyback Yield: Formula, Gross vs Net Repurchases, and Investor Interpretation

CapEx-to-Depreciation Ratio: Reinvestment Intensity Without False Precision

Capital Expenditures (CapEx): Cash Flow, Depreciation, and Investor Use

Capitalization Rate: Formula, Meaning, and REIT Valuation

Capitalization vs. Expensing: How Timing Changes Reported Profit and Assets

Capitalized Development Costs: Development Spending Recognized as an Intangible Asset

Car Rental Fleet Cost per Unit per Month: Vehicle Ownership Economics

Car Rental Revenue per Day: Rental Pricing Explained

Car Rental Revenue per Unit per Month: Fleet Productivity Explained

Car Rental Transaction Days: Rental Volume Explained

Car Rental Vehicle Utilization: Fleet Loading Explained

Case Reserves: Definition and Role in Insurance Loss Reserving

Cash Conversion Cycle: Formula, DIO, DSO, DPO, and Investor Use

Cash Flow Quality: How Sustainable Is a Company's Cash Generation?

Cash Ratio: Formula, Liquidity Meaning, and What the Number Misses

Cash Tax Rate: Taxes Paid, Accounting Tax Expense, and Sustainable Cash Flow

Catastrophe Retention: What an Insurer Keeps Before Reinsurance Responds

Ceded Premiums: Reinsurance Cost, Retention, and Investor Analysis

Ceding Commission: Reinsurance Expense Reimbursement and Treaty Economics

Change in Accounting Estimate: Updating a Measurement With New Information

Change in Accounting Policy: When the Accounting Basis Changes

Chief Operating Decision Maker: The Role Behind Segment Reporting

Client Incentives: Payment Network Rebates and Contra-Revenue

Cloud Computing Implementation Costs: Accounting for SaaS and Hosting Setup Costs

Combined Ratio: Definition, Formula, and Insurance Underwriting Profitability

Commercial Engine Backlog: Future Aerospace Engine Demand Explained

Commercial Engine Deliveries: Aerospace Engine Unit Volume Explained

Commercial Engine Installed Base: Aerospace Aftermarket Opportunity Explained

Common Equity Tier 1 Ratio: A Core Bank Capital Measure

Containerboard Inventory: Packaging Supply and Demand Explained

Containerboard Outside Shipments: External Packaging Sales Explained

Containerboard Production: Packaging Mill Output Explained

Contract Asset: Revenue Earned Before an Unconditional Right to Payment

Contract Liability: Customer Consideration Received Before Revenue Is Earned

Contribution Margin Ratio: Contribution Margin as a Share of Revenue

Contribution Margin: Revenue Left After Variable Costs

Corrugated Products Shipments per Day: Packaging Demand Explained

Cost of Deposits: Definition, Formula, and Bank Funding Analysis

Cost of Goods Sold (COGS): Formula, Accounting, and Investor Use

Cost per Available Seat Mile (CASM): Airline Unit Cost

Cost-Volume-Profit Analysis: Linking Sales, Cost Behavior, and Operating Profit

Crack Spread: A Market Benchmark for Refining Economics

Cross-Border Volume: International Payment Activity

Cruise Capacity Days: Comparing Available Passenger Capacity

Cruise Net Per Diem: Monetization per Passenger Cruise Day

Cruise Net Yield: Revenue Economics per Capacity Day

Cruise Occupancy Rate: Why Load Factor Can Exceed 100%

Current Ratio: Formula, Interpretation, and Liquidity Limits

Customer Acquisition Cost (CAC): What It Costs to Add a Customer

Customer Churn Rate: Measuring Customer Loss Over Time

Customer Lifetime Value (LTV): Estimating the Economics of a Customer Relationship

Daily Active Users (DAU): Measuring Day-to-Day Platform Engagement

Portfolio construction, asset allocation, rebalancing, diversification, asset-pricing theory, factor pricing, active-management skill and implementation, return attribution, risk-adjusted performance appraisal, systematic and factor risk, risk budgeting, fund economics, options pricing, volatility term structure, risk-neutral pricing, core and higher-order Greeks, option payoff structures and overlays, derivatives mechanics, benchmark-relative analysis, optimization, tail-risk measures, and strategy structures that affect how investors take and manage exposure.

Portfolios, Funds & Investment Strategies

100% Equities Strategy: Return Potential, Drawdowns, and Portfolio Risk

12b-1 Fee: Distribution Fees, Fund Expenses, and Compounding Drag

130/30 Strategy: Gross Exposure, Net Exposure, and Risks

Active Return: Performance Relative to a Benchmark

Active Share: Measuring How Far a Portfolio Differs From Its Benchmark

Allocation Effect: Return Impact of Portfolio Overweights and Underweights

Alpha: Benchmark-Adjusted Return, Jensen Alpha, and Model Dependence

American vs. European Options: Exercise Style, Early Assignment, and Valuation

Appraisal Ratio: Alpha per Unit of Residual Risk

Arbitrage Pricing Theory: Multifactor Expected Returns Without CAPM's Market Portfolio

Bear Spread: Defined-Risk Downside Exposure With a Capped Gain

Beta: Market Sensitivity, Systematic Risk, and Benchmark Dependence

Binomial Option Pricing Model: Trees, Risk-Neutral Valuation, and Early Exercise

Black-Scholes-Merton Model: Assumptions, Formula, Greeks, and Model Risk

Box Spread: Using Four Options to Create a Fixed Expiration Payoff

Breadth in Active Management: The Effective Number of Independent Decisions

Brinson Attribution: Allocation, Selection, and Interaction Effects

Bull Spread: Defined-Risk Upside With a Capped Maximum Gain

Butterfly Spread: A Defined-Risk Options Position Built Around a Target Price

Calendar Spread: Trading Relative Time Value Across Expirations

Capital Allocation Line: Risk-Free Assets, Risky Portfolios, and the Sharpe Ratio

Capital Asset Pricing Model: Beta, Market Risk Premium, and Expected Return

Capital Market Line: Market Portfolio, Total Risk, and Expected Return

Collar Strategy: Downside Protection Financed by Capped Upside

Condor Spread: Four Strikes, Defined Risk, and a Wider Target Zone

Correlation: How Asset Returns Move Together and Why It Changes

Covariance: Measuring How Investment Returns Vary Together

Covered Call: Premium Income in Exchange for Capped Upside

Diagonal Spread: Combining Different Option Strikes and Expirations

Diversification: Spreading Risk Across Different Economic Exposures

Efficient Frontier: The Risk-Return Boundary in Portfolio Optimization

Expected Shortfall: Average Loss Beyond a Tail-Risk Threshold

Factor Model: Systematic Exposures, Risk Attribution, and Expected Return

Factor Risk Premium: Expected Compensation for Systematic Exposure

Fundamental Law of Active Management: Skill, Breadth, Constraints, and Active Risk

Implied Volatility Surface: Strike, Expiration, Skew, and Term Structure

Implied Volatility: What Option Prices Say About Expected Movement

Information Coefficient: Measuring Forecasting Skill in Active Management

Information Ratio: Active Return, Tracking Error, and Benchmark-Relative Skill

Interaction Effect: Joint Impact of Allocation and Selection Decisions

Iron Butterfly: How the Four-Leg Options Structure Changes With Long or Short Orientation

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