Wells Fargo analyst Christopher Manuel noted that an explosion reportedly occurred at Packaging Corp.'s (PKG) DeRidder mill, which he said represents about 25% of the company's containerboard production and 2.5% of North American containerboard capacity. While the situation is developing and still fluid, he believes this exerts "further stress on a containerboard market that is already supply constrained." On Packaging Corp. specifically, he said insurance should limit financial losses to a deductible. Other containerboard companies include International Paper (IP), KapStone (KS) and WestRock (WRK).