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HDPHNS, it's quite possible that Google is doing that on purpose--that they see the product is out of stock so they don't rank it as high. Google wants to provide a good user experience, and it would be frustrating if someone went to Google, did a search, went to your site, and found that the product is out of stock.

The emd update did hurt partial matches also but as stated by Antony Wilson users do prefer them. Just make sure the emd is brandable and not spammy seo sounding.

Thanks, but I rather not since the competition is reading this as well