Classify the following events as mostly systematic or mostly unsystematic. Is the distinction clear in every case? Short-term interest rates increase unexpectedly. The interest rate a company pays on its short-term debt borrowing is increased by its bank. Oil prices unexpectedly decline. An oil tanker ruptures, creating a large oil spill. A manufacturer loses a multimillion-dollar product liability suit. A Supreme Court decision substantially broadens producer liability for injuries suffered by product users