South African Corn Advances on Technical Indicator

White corn in South Africa gained the most in more than three months by the midday close in Johannesburg as a technical indicator signaled that prices had fallen too far. The yellow variety also increased.

The white corn contract for delivery in December gained 3.2 percent to 1,748 rand ($164) a metric ton on the South African Futures Exchange. That was the biggest move for a most-active contract since March 25. The grain’s 14-day relative strength index reached 40 today. Between June 30 and July 9 it was below 30, the level that suggests a potential impending rebound to some analysts who study charts.

Prices have dropped 38 percent this year. South Africa’s farmers will produce 13.9 million tons of corn in the 2014-15 season, according to the country’s Crop Estimates Committee, which would be the biggest harvest since 1981.

Technical indicators show “very strong oversold conditions and this is a technical correction,” Thys Grobbelaar, an analyst at Klerksdorp-based Senwes Ltd., said by phone.

The nation is Africa’s biggest producer of corn. Meal from white corn is used to make a staple food known as pap. The yellow variety is used for animal feed.

Yellow corn for delivery in December rose 1.6 percent to 1,828 rand a ton. Wheat for delivery in the same month gained 0.6 percent to 3,531 rand a ton.

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