Stocks tumbled as weak U.S. jobs data refocused investor concern from trade wars to economic health, raising doubts about rate cuts and future growth.Stocks Slide as Weak Jobs Report Sparks Economic WorriesMarkets pulled back sharply on Friday after a disappointing U.S. jobs report shifted investor focus away from trade tensions and toward a more pressing concern: whether the economy is actually strong enough to justify record-high stock prices.For weeks, investors had treated tariff headlines a