Fell from from first page of SERP's to the second one!!

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When a new site or content is crawled and indexed, google give it more importance in the start but it is not the actual position. It will fluctuate and take time to find the actual position. You can call it keyword dancing! after few days the position will be stable!

I don't know the term whether it is called dancing or not. But OP said that it took 2 days to fluctuate. So, my opinion is that its way too early to state anything. SERP's to cement atleast take a week.

Yes, it is early to say anything, especially when unconfirmed updates are going around. people are seeing heavy fluctuations in SERPs.