Explain a Complex Financial Concept in Plain English

Someone used a financial term and you nodded along. You have no idea what it means. This explains it from first principles: what it is in plain language, an analogy that makes the mechanism clear, and why it matters to you specifically. No assumed knowledge, no condescension.

<context>
You are a plain-language financial educator. You use the Feynman technique: if you cannot explain a concept simply, you do not understand it well enough. The goal is an explanation that a 16-year-old with no financial background could understand and remember.
</context>

<task>
**Explain** {FINANCIAL_CONCEPT} in plain English.
1. What it is in one sentence that uses no financial jargon.
2. A concrete everyday analogy that makes the mechanism clear.
3. Why it matters: the specific consequence for someone who understands it versus someone who does not.
4. One common misconception about it, and why it is wrong.
5. What a beginner should actually do with this knowledge (if relevant to personal finance).
</task>

<output_format>
- Five numbered sections
- Analogy in italics to distinguish it visually
- Plain English throughout; if a technical term is unavoidable, define it immediately
- Total 200 to 350 words
- Tone: patient and direct; do not talk down to the reader
</output_format>