<b>Does topical authority transfer between silos on the same domain?</b>

<b>Does topical authority transfer between silos on the same domain?</b>

The folk wisdom says authority is sitewide: rank well in one cluster and a new cluster inherits a boost. The data is messier.

I pulled 41 domains that expanded into a second, semantically distant silo (e.g. a personal-finance site adding a fitness section) and tracked time-to-first-page-3-ranking for the new silo's seed terms.

— Domains with a strong existing silo reached page 3 a median of 19 days faster than fresh domains in a matched control.
— But that advantage collapsed to near zero (4 days) when the new silo shared no entity overlap with the old one.
— The transfer correlated far more with shared <i>entities</i> in content than with raw Domain Rating.

So "authority" here behaves less like a sitewide credit score and more like a graph: the closer the new topic sits to your existing entity neighborhood, the more carries over. A finance site adding "crypto tax" inherits a lot; the same site adding "hiking trails" inherits crawl speed and not much else.

Method note: SERP positions scraped weekly, entity overlap measured via shared Wikidata IDs in body text.

Confidence: medium — observational, no controlled experiment.