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Where it is explained in full

Workplace plans: the 401(k), the 403(b), and the TSP, from the first paycheck to the last. Everything a person needs to open one, fill it, hold the right things in it, avoid the traps, and carry it with them when they leave. Long on purpose, so that one page is enough.

Funds: what you actually own when you buy one. Both kinds are baskets. The differences are in how you buy them, how they are priced, how they handle taxes, and what it costs to hold them for decades.

Covered calls: the whole position, not just the premium. Selling a call against stock you own puts money in your pocket today and gives something up tomorrow. Look at both halves, or the premium will look like free money when it is not.

Cash secured puts and the wheel. Selling a put with cash set aside is a paid promise to buy stock at a price you chose. The wheel chains that promise to a covered call. Both deserve a full accounting.

Options from the beginning: calls, puts, and the Greeks in plain words. What a contract actually is, what the numbers on the screen mean, and why an option's value before expiration is not the same as its payoff at expiration.

What a one percent fee costs over a working life. The fee is small. The share of your ending balance it takes is not. The arithmetic is short and worth seeing once, because after that you cannot unsee it.

A definition says what a thing is; it never says whether it fits you. The guides explain how it works and name the professional who confirms it for a particular person. The No Advice Disclosure.