[lotsofpulp]

Amazon pricing is not a reliable source of changes in cost of goods sold, especially if not shipped and sold by Amazon. Plus you are pricing in home delivery.

I would use a retailer known to keep margins as low as possible like Costco as a better gauge. I buy rolled oats all the time, and between Costco and Trader Joe’s, I have not noticed any pricing swings in oats.

[conjecTech]

Agreed Amazon isnt the most reliable, but as I said, I corroborated this at a few other stores. Costco generally has fixed markups for its products (15%), as does Trader Joes. The fact that you haven't seen price fluctuations there aligns with my conclusion that the price volatility isnt being driven by increases in the cost of goods, but rather retailers who think they can trying to increase margins.