Frequently asked
What does the XY - Steam Siege · Ultra Rare · Composite track?
48 XY - Steam Siege Ultra Rare cards graded PSA 7 to PSA 10, weighted by market cap. It started at 100.00 on 2026-05-15 and stands at 149.12.
How has the XY - Steam Siege · Ultra Rare · Composite moved?
It is up 2.0% over the past month and up 49.1% year to date.
Which cards carry the most weight in the XY - Steam Siege · Ultra Rare · Composite?
M Gardevoir EX (PSA 10) at 25.8%, Gardevoir EX (PSA 10) at 12.3% and Steelix EX (PSA 10) at 11.4% of the index.
How is the XY - Steam Siege · Ultra Rare · Composite calculated?
The level is the constituents' combined market cap (fair value times graded population) divided by a divisor, with each card's weight dampened by the confidence of its fair value. The index rebalances weekly and the divisor absorbs every membership and population change, so only prices move the level. Values are recomputed daily from graded sales.