There's a key report investors should be mining this week for recession warnings , according to the investment arm of one notorious market bear. Hussman Strategic Advisors — the investment advisor led by the famed permabear John Hussman — said it was eyeing a handful of signs of weakness in the coming September jobs report, which markets will be digesting on Thursday. The report is expected to be in sharp focus for investors, who have been left in the dark on official labor market data during