StockDiagnostics.com monitors a public company's Operational-cashflow Per Share ("OPS") and assigns it an "OPS Ranking". OPS Rankings measure the long term risk associated with a company's ability to remain in business. They were discovered from in-depth research conducted by StockDiagnostics.com on operational cash flow. These studies revealed that a company's "OPS" (Operational- cashflow Per Share) logically falls into a mathematical sequence that ranks it into one of eight distinctive "risk" categories. Each of the categories is based on a company's operating cash flow for each of its last 4 quarters and its cumulative operating cash flow for its most recent 12 months.