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Hey there! Tawny from Moz's Help Team here. Sorry to hear about your DA dropping after our index update! That's a bummer! Rand does a really good job of breaking down what went differently with this month's index and why it affected DA scores the way it did in this thread: https://moz.com/community/q/is-everybody-seeing-da-pa-drops-after-last-moz-api-update#reply_359883 Take a gander and see if that helps answer why your scores have dropped. If you've still got questions, feel free to shoot us a note at help@moz.com and we'll do our best to answer them all.