First, the user wants an original article for the keyword "What Is No Arbitrage". I need to use the provided context where useful, but I must not mention that it's AI-generated. The context includes references to Khan Academy videos, so I can incorporate that structure or examples. The article should be 600 to 900 words, with natural headings, and avoid unsupported claims. I'll write in HTML format using only safe tags like h2, h3, p, ul, ol, li, strong, and em. No markdown fences. I'll structure the article around explaining no arbitrage, using the context to illustrate concepts. The context mentions "How are options priced?" and "the fundamental concept of" no arbitrage, so I'll focus on that. Outline: - Introduction: Define no arbitrage and its importance in financial markets. - What is Arbitrage? Explain arbitrage briefly. - The No-Arbitrage Principle: Core concept. - Application in Pricing: Options, futures, etc., using context from Khan Academy. - Examples: Illustrate with simple scenarios. - Conclusion: Recap key points. I'll ensure the article is informative, concise, and SEO-friendly. Use natural headings like h2 and h3. Let me draft the content. Start with an h2: Introduction **P**: No arbitrage is a cornerstone principle in finance that ensures markets remain efficient. It posits that in a well-functioning market, it should not be possible to earn risk-free profits without any investment. This concept is crucial for pricing financial instruments like options and futures. Then, h3: Understanding Arbitrage **P**: Arbitrage involves buying and selling the same asset in different markets to profit from price differences. For example, if a stock is trading at $100 on one exchange and $101 on another, an arbitrageur can buy at $100 and sell at $101 for a risk-free profit. However, such opportunities are rare and short-lived. h3: The No-Arbitrage Principle **P**: The no-arbitrage principle asserts that markets should adjust so that arbitrage opportunities are eliminated. This is foundational for deriving fair prices. It implies that assets with identical cash flows should have the same price. Incorporate context: From the provided context, "Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now:..." I can mention that Khan Academy offers resources to learn these concepts. But I need to integrate this naturally. For example, "As explained in educational resources like Khan Academy, the no-arbitrage condition helps in pricing options." Now, h2: How No Arbitrage Influences Pricing h3: Options Pricing **P**: The no-arbitrage principle is key in options pricing. For instance, the put-call parity relationship relies on it. This relationship shows that the price of a call option, put option, and the underlying stock must be consistent to prevent arbitrage. Use context: "How are options priced? And why does 'no arbitrage' matter? The answer lies in models like Black-Scholes, which assume no arbitrage." h3: Futures and Forwards **P**: Similarly, futures and forward contracts are priced based on the no-arbitrage condition. The price must reflect the spot price and carrying costs, otherwise arbitrage would occur. From context: "https://sites.google.com/view/vinegarhill-financelabs/forward-and-futures." I can reference this site for more detail. h2: Real-World Implications **P**: No arbitrage ensures market stability. When discrepancies occur, arbitrageurs act quickly to correct them, maintaining efficiency. h2: Conclusion **P**: Understanding no arbitrage is essential for investors and traders. It forms the basis of many financial theories and models. Now, write the article in HTML. Use proper tags. I need to keep it between 600-900 words. Let me count words as I write. Draft:

Introduction to No Arbitrage

The concept of no arbitrage is fundamental to financial economics. It describes a state where opportunities for risk-free profit do not exist. This principle is critical for market efficiency and is used to price derivatives and other securities. When markets are in equilibrium, the no-arbitrage condition ensures that assets are valued consistently.