Material weakness

A material weakness is a serious flaw in a company's internal controls—the systems and processes that keep financial records accurate and prevent fraud. You'll see this term in SEC filings (official documents companies file with regulators), and it matters because it's a red flag that the company's financial statements might not be trustworthy. When auditors discover a material weakness, they're essentially saying "we found a problem big enough that it could lead to major errors in the numbers you're reading." For example, if TechCorp Co. couldn't properly track inventory or had weak approval processes for large expenses, auditors might flag that as a material weakness. It doesn't mean the company is definitely cooking the books—just that the safeguards aren't working well enough to give investors confidence.