American-origin classic and youngtimer motorcycles, principally the Milwaukee V-twins.
Below: every constituent with live pricing plotted along the € axis. Each amber mark is one model's current median price.
| Years | Liquidity | |||
|---|---|---|---|---|
Change is measured over the longest period available for each model; coverage is still building.
Models are assigned to R-USA by marque origin, era and segment. Every tracked model with sufficient listings contributes.
For each constituent we compute a monthly median from observed European listings and auction results, requiring at least three observations in a month before a median is published — thin months are left blank rather than estimated.
R-USA is equal-weighted across constituents with published medians, rebased to 100 at its base month. The index level moves via chain-linking: month-to-month it reflects the price change of constituents present in both months.
Where the index has few months of overlapping data, its level stays near its base and we say so. Index history deepens as our weekly collection accumulates — we show current composition until the series is meaningful.
Full methodology paper available free in Reports.