Will this cause cheaper groceries coming soon?

Sometime this summer, my Dial soap gained an hourglass waist. While this is a good thing for a person, it's not good for my soap, which used to be solid, rectangular, and gripped well in my hand.

Barring a production line of whistling whittlers at Dial Corporation playing a prank with the product, let's call it package shrinkage, a practice to make up for rising costs.

Shrunken packaging with the same price crept into the stores last year along with rising prices on products that couldn't shrink.

The chart below show the price on the futures market of one contract of wheat (one contract = 5000 bushels). Below is the average monthly cost that industry paid for each contract.






















Easy to see why the cost of things like bread went sharply upwards last year. But wait. Doesn't the chart also show those costs sliding back down the other side of the mountain? I would expect price decreases at the grocery store are to come.

In case you think I picked wheat because of its dramatic trend, here's some other charts with the same curve. Remember that soy, corn, and derivatives of these are hidden in almost every packaged food product we have.