======U.S. Generally Accepted Accounting Principles (GAAP)======
U.S. Generally Accepted Accounting Principles (also known as 'GAAP') are the official rulebook for corporate accounting in the United States. Think of it as the grammar for the language of business. These standards are developed by the private-sector [[Financial Accounting Standards Board (FASB)]] and enforced by the government's [[Securities and Exchange Commission (SEC)]] for all publicly traded companies. The main goal of GAAP is to ensure that a company's [[financial statements]] are consistent, comparable, and reliable. This common framework allows investors, lenders, and managers to look at a company's finances and have a shared understanding of what the numbers mean. Without GAAP, comparing one company to another would be like comparing a story written in English to one written in Klingon—possible, but incredibly difficult and prone to error.
===== Why Should an Investor Care About GAAP? =====
For an investor, understanding the basics of GAAP isn't just academic; it's fundamental. These rules dictate how companies report their financial health, providing the raw material for nearly all investment analysis.
GAAP is the reason you can trust, to a certain extent, the numbers you see on a company’s three main financial reports:
  * **The [[Income Statement]]:** Shows a company's profitability over a period.
  * **The [[Balance Sheet]]:** Provides a snapshot of what a company owns (assets) and owes (liabilities) at a single point in time.
  * **The [[Statement of Cash Flows]]:** Tracks the movement of actual cash into and out of the company.
By mandating a standardized format, GAAP allows you to compare Company A's performance against Company B's, or to track a single company's progress over several years. It creates a level playing field for financial reporting, which is the starting point for any intelligent investment decision.
===== The Value Investor's Perspective on GAAP =====
Value investors, who follow in the footsteps of figures like [[Benjamin Graham]] and [[Warren Buffett]], have a healthy, skeptical relationship with GAAP. They know that while GAAP is an indispensable tool, it doesn't always reflect //economic reality//. As Buffett once said, the key is to focus on the business figures that are "knowable and important." GAAP provides the knowable, but it’s the investor's job to determine what's truly important.
==== The Good: GAAP as a Starting Point ====
GAAP provides the essential data. Its system of [[accrual accounting]], which records revenues when they're earned and expenses when they're incurred (not necessarily when cash changes hands), gives a smoother picture of a company's operational performance than cash movements alone. Without this structured data, calculating a company's value would be pure guesswork.
==== The Quirks: Where GAAP Can Mislead ====
A smart investor reads financial statements like a detective, knowing that the accounting rules can sometimes obscure the truth.
  * **Historical Cost vs. True Value:** GAAP generally requires companies to record assets at their [[historical cost]] (what they originally paid for them). A plot of land bought for $50,000 in 1975 might still be on the books for $50,000, even if it's now prime real estate worth millions. A value investor hunts for these hidden assets, whose true [[intrinsic value]] is not reflected on the balance sheet.
  * **"Earnings" Are an Opinion:** The bottom-line profit, or [[earnings per share (EPS)]], is often called the most massaged number in a financial report. Managers have leeway in choosing depreciation methods, valuing inventory, and estimating bad debts, all of which can inflate or deflate reported earnings. This is why many savvy investors prefer to focus on [[free cash flow]], which is much harder to manipulate.
  * **Fuzzy Intangibles:** GAAP struggles to account for the most valuable assets of many modern companies, like brand recognition, proprietary technology, or a brilliant corporate culture. On the other hand, an accounting fiction called [[goodwill]] can clutter up the balance sheet after an acquisition, often representing an overpayment for a past deal rather than a currently valuable asset.
===== GAAP vs. IFRS =====
For investors looking at companies outside the U.S., it's crucial to know that most of the world doesn't use GAAP. Instead, over 140 countries have adopted [[International Financial Reporting Standards (IFRS)]]. While they are converging, some key differences remain.
==== Key Differences in a Nutshell ====
  - **Rules vs. Principles:** The biggest philosophical difference is that GAAP is highly "rules-based," providing detailed, specific rules for almost every situation. IFRS is more "principles-based," offering broader guidelines and requiring more management judgment. This can lead to very different outcomes for similar transactions.
  - **Asset Valuation:** Unlike GAAP's strict historical cost principle, IFRS allows companies to revalue certain assets, like property and equipment, to their current fair market value. This can make an IFRS-reporting company's balance sheet look much stronger than an identical GAAP-reporting company's, so be careful when making comparisons!
Ultimately, whether a company reports in GAAP or IFRS, the value investor's job remains the same: use the accounting reports as a starting point, but never stop asking what the //true// underlying business is worth.