Wheat futures for May were down 23 cents, or 5 percent.
Financial institutions now make up 61% of all investment in wheat futures.
Wheat futures rose 3.4 percent from 2000 to end the year at $2.89 a bushel.
Wheat futures rose nearly the 20-cent limit permitted in that market.
He would take a short position in wheat futures.
The report was expected to prompt new buying of wheat futures Friday.
Support for wheat futures also came from limited farmer selling over the weekend.
Wheat futures were expected to open slightly higher today.
Wheat futures were up more than 5 cents a bushel at one point.
Wheat futures were lifted by reports that China had entered the market for the grain.