What this is
Derived ratio 28,800/15,500 from two cells of the same table (Mar 2026 cell for Black Bolt is the 5 March 2026 daily cell). Common level shift in Apr 2026 across 2023-25 sets; cause not stated by source.
Where it comes from
Japanese-language document, 2026 PRICE BASE (price-base.com; card buyer/reseller) · 24 October 2026 Open the original ↗
The line in the source
2026年3月 15,500円 -> 2026年4月 28,800円 (PRICE BASE 独自調査に基づく、大手フリマサイトでの実績を参照) In English
ブラックボルト: one-month change in the flea-market price; seller tier secondary/resale.
Related figures
The same measure, other periods