Definition: Investment grade coins are of the highest grades and rarity, usually Extremely Fine, Mint State, and Proof. Coins which are purchased as an investment, more than for their collector appeal. Coins which are usually more expensive than the average collector can routinely afford to buy. Contrasted with collector grade coins.
Also Known As: Investor quality coins
Examples:Rather than buy one investment grade coin, I'd rather spend my budget on dozens of collector grade coins.