Corteva shares plunged 24.3% to $9.19 on Thursday, 12 November, after weak sales in Brazil dragged third-quarter revenue below forecasts and the crop protection company cut its full-year outlook. It was the worst one-day fall on record for the shares, according to Dow Jones Market Data cited by Barron's.

Corteva, which makes seeds and crop protection chemicals, reported its results after the market closed on Tuesday, 11 November. Third-quarter net sales fell 9% from a year earlier to $1.591 billion, short of the roughly $1.77 billion analysts had expected. Adjusted earnings dropped 57% to $0.06 a share, against expectations of $0.10, while adjusted operating earnings before interest, tax, depreciation and amortisation fell 17% to $222 million. On a reported basis the company recorded a loss from continuing operations of $54 million, or $0.08 a share, against a $60 million profit a year earlier. The shares had already slipped 7% to 8% in after-hours trading on Tuesday, and the selling carried into Thursday's session on heavy volume of about 18 million shares, according to Kalkine.

Brazil turns from growth driver to burden

The shortfall was concentrated in one market. Sales in Latin America slid 28% to $570 million, with volumes down 24% and prices 7% lower. On an organic basis, which strips out currency and portfolio effects, regional sales fell 31%. Brazil is usually a dependable source of second-half sales as growers buy ahead of soybean planting, but this time farmers held back.

Corteva blamed tight farmer liquidity, expensive borrowing, just-in-time buying by growers and distributors, and mounting price pressure on older crop protection products now facing generic rivals. Elevated stocks in the distribution channel also postponed orders, so demand that would normally have arrived in the quarter was pushed back. Group sales fell 9% overall, with prices down 7% and volumes down 2%.

Guidance cut sharply

The outlook did as much damage as the quarter itself. Corteva cut its 2026 guidance to adjusted operating earnings before interest, tax, depreciation and amortisation of $1.1 billion to $1.125 billion, and adjusted earnings of $0.76 to $0.80 a share. Citi analyst Patrick Cunningham called the guidance “sharply lower” in a note on Wednesday, blaming weather and high interest rates, and Barron's noted that the new outlook implies fourth-quarter earnings before interest, tax, depreciation and amortisation of less than $200 million.

A factory restructuring will also absorb roughly $130 million to $140 million this year. The picture was not uniformly bleak: North American sales rose 7% in the quarter, and over the first nine months of the year sales edged down only 1% to $5.357 billion while adjusted earnings rose 49%. But with Brazil accounting for so much of the second-half season, investors focused on the downgrade.

Wider fallout for farm suppliers

Corteva was the heaviest large-cap faller of the day, and the wider market offered no shelter: the S&P 500 fell 0.35% on Thursday. Results from rival FMC also weighed on the stock, and the company has recently spun off its seed business, Vylor, leaving it more exposed to the crop chemicals cycle. A law firm, Glancy Prongay Wolke & Rotter, has since announced a securities fraud investigation on behalf of investors who lost money in the drop, according to a BusinessWire notice.

What matters next is whether Brazilian channel stocks clear in time for the next planting season and whether the restructuring delivers the savings management expects. Until then, a stock that traded near $91 in July now sits below $10, and the market is pricing in a long recovery rather than a quick rebound.