Al Jazeera’s Jonathan Shillingfield reports from Nebraska on the futures contracts that Acorns is buying.
The US corn futures market has been volatile since last summer.
Prices were at record highs in late May and early June.
On May 6, corn futures closed at $13 a bushel, up more than 60% since last June.
But as the US corn harvest has started, the price has fallen to $8.70 a bushe, down by more than a third from its peak of $18 a bushell.
The price drop has been devastating for farmers, whose futures contracts have been worth about $1.3bn (£750m).
The market has also been hit by a US court ruling that ordered Acorns to pay the farmers in return for the futures.
In a case known as the “Wyoming case”, Acorns had agreed to pay $300m in compensation to the farmers.
But in November, US District Judge Stephen Reinhardt ruled that Acrees was not liable for the farmers’ losses.