Investors who were bloodied in the year-opening stock rout will be hard pressed to find any salve next week. With prospects dimming for a strong start to earnings season, and worries about slow growth in China continuing to overhang the market, even a price-driven rally may not last beyond a day or three, say longtime market watchers. “This is a tsunami of negative psychology being driven by China,” said Phil Orlando, chief equity market strategist at Federated Investors in New York.