Indexes hold one copy of every card in them, priced daily. Share = this printing's market price divided by the index value today.
The change is the index's past year: price moves only, not reprints joining.
3 more · cheapest first
Every other printing with the same card name, ignoring notes like (Borderless) or (Retro Frame). Cheapest TCGplayer market price first; printings with no sales yet come last.