Yield River — is today's dividend yield high or low versus its own history
Is a 5% yield high? Ordinary for a bank, rare for a chip designer. The yield river puts a stock's cash yield back into its own historical percentile bands — where today sits, and how far from the historically-rich zone. Bands accrue from daily official valuation snapshots, compounding in depth over time.
How the bands are built
Daily official yield snapshots accumulate into a per-stock historical distribution, cut at fixed percentiles (10/25/50/75/90) to form the river. Same snapshot substrate as the PER river: historical dates return as-of versions, so backtests never see later revisions.
What we deliberately do not do
We do not publish high-yield rankings, and a yield sitting in its historical high band does not mean a good entry — the most common reason a yield rises is that the price is falling, and falling prices usually have a reason.
We also do not forecast the next dividend. Bands are built from cash dividends actually paid; estimated dividends are never mixed into the historical percentile, which would contaminate the entire band with future information.