Stock Market Rally Buckles; Moderna, Gold, Bitcoin Surge While Walmart Tumbles: Weekly Review

The stock market had a bad week, with the key indexes all falling below their 21-day moving averages on Thursday while the Nasdaq composite closed below its Aug. 4 follow-through day low, a bearish signal that its rally will ultimately fail. A Treasury Department move to buy some long-dated bonds didn't have much lasting impact on yields, which are around…