Definition
The efficiency or ease with which an asset or security can be converted into ready cash without affecting its market price.
In Panel Profits
The velocity and depth with which a certified comic slab can be sold on major platforms (Heritage, ComicLink, eBay, convention floor) without accepting a steep markdown from its 90-day FMV.
Comic-market example
Spider-Man and Batman Silver Age keys possess ultra-high liquidity with daily auction transactions, whereas obscure Golden Age non-hero issues may take months to find an authenticated buyer.
Calculation
Liquidity Ratio = 30-Day Trading Volume ($) / Total Market Float ($)