Market sell-off is not the only thing continuing into the weekend; the US-Iran war is too. South Korea's margin plays backfire for their traders and some are even forced to liquidate their accounts to stop the losses. This effect spirals into the US market as well, causing many big names and high beta stocks to drop massively. Heading into earnings season, we have also seen barely hitting analysts' expectations is not enough - investors are pricing in not just the fundamentals but also the future forward guidance.