On Thursday, US stocks sank in turbulent trading.<br />Falling tech giants dragged on benchmark indexes.<br />Tech names had rebounded on Wednesday. However, they resumed their downward spiral as investors shunned their still lofty valuations.<br />Traders also mulled weekly jobless-claims data that signaled lasting pain in the US labor market.<br />Jobless claims totaled 884,000 for the week that ended on Saturday, missing the economist estimate of 850,000.<br />Oil fell after the American Petroleum Institute reported that US stockpiles increased by nearly 3 million barrels.<br />West Texas Intermediate crude sank as much as 2.9%, to $36.95 per barrel.
