US Chemical and Ammunition Stocks Plunge Nearly 6% Amid Earnings Shock, $240 Billion Vanishes in a Day

Olin Corporation (ticker: OLN) shares closed at $26.76 on May 12 on the New York Stock Exchange, a 5.83% decline that erased approximately $168 million in market value, or about KRW 240 billion. Trading volume was roughly 1.35 million shares, bringing the company’s market capitalization to about $3.05 billion (approximately KRW 4.3 trillion).

In its first-quarter 2026 earnings released May 7, Olin reported a net loss of $83 million on revenues of $1.583 billion. Revenue fell about 3.7% year-over-year, and adjusted EBITDA also declined significantly, heightening concerns over weakening demand.

Management said that price increases in its chlor-alkali and epoxy segments, cost reductions in Europe, and a recovery in Winchester ammunition demand should drive a substantial quarter-over-quarter profit improvement in Q2. Nonetheless, investors remain cautious about the underlying materials cycle and ongoing margin pressures.

Headquartered in Clayton, Missouri, Olin is a global chemicals and ammunition company supplying chlor-alkali products, vinyl, epoxy resins, and Winchester-brand ammunition through three business segments. Given its portfolio’s high sensitivity to economic cycles in industrial chemicals and ammunition, the company’s financial results and share price tend to exhibit significant volatility in line with global manufacturing and construction activity as well as defense and recreational demand cycles.