Definition
Classifying an asset by its formal type -- equity, debt, real property, commodity -- determines which valuation framework, comparable set, and market convention apply to it, independent of any single issuer's marketing description of that asset.
In Panel Profits
'Sequential Art' is the formal term for the comics medium coined by cartoonist Will Eisner in his 1985 book 'Comics and Sequential Art' -- the arrangement of pictures and words in a deliberate sequence to convey narrative or idea. Panel Profits uses it as the base asset-classification term underlying every priced comic-book asset: before any grading, key-issue, or first-appearance premium can apply, an item must first qualify as sequential art (a sequenced narrative artifact) rather than, e.g., a single unbound illustration or a purely text publication, which is why the term functions in the platform's asset-classification schema rather than as a pricing mechanic on its own.
Comic-market example
Action Comics #1 qualifies as sequential art because its story is told through a deliberate sequence of panels; a single Superman pin-up print from the same era, despite comparable age and rarity, is not sequential art and is priced under a different asset class entirely.
Common mistakes
Do not use 'sequential art' as a synonym for 'key issue' or 'first appearance' -- it is a medium classification, not a value driver in itself, and applies equally to a $5 back-issue and a six-figure key.