Search results for commercial queries are subject to rather drastic changes. It is partly due to market dynamics, which is all the more lively when there are many small players involved. The other reason is the SEO factor, often used by companies to influence the web output. That's why it is particularly interesting to take a look at the output updates for such queries.

The analyzer was created after Yandex had announced its decision to cease attributing any ranking factor value to links for commercial queries in its Moscow regional results. It looked tempting to investigate the consequences that such a decision would have for commercial output. For the sake of comparison, the same set of queries is presented to the search engines from several other locations in Russia. Moreover, the results can at any moment be compared to those of the basic Updates Analyzer .

The formula that calculates the Analyzer's values for each region is the same as in the Update Analyzer. For each domain that is present in the SERP on both the current and the previous days, the sum of position changes is calculated (it is divided by the total number of elements in the SERP). The number of newly appearing domains is then added and the Analyzer index is the total sum divided by the number of different sites in the current SERP.

The TIC link shows the average Thematic Citation Index, an index used by Yandex to determine the total weight of links, leading to a certain site. The PageRank tab in turn shows the average Google PageRank of all pages shown by each search engine.