As US stocks (^DJI, ^IXIC, ^GSPC) hope to recover from last week's tech sell-off, Allianz chief economic adviser Mohamed El-Erian tells Yahoo Finance that while volatility (^VIX, ^VVIX) already remains a top theme for markets in 2026, he outlines how investors should expect equities to overreact to the upside and the downside. El-Erian is also the Rene M. Kern Practice Professor at the University of Pennsylvania's Wharton School. Watch Mohamed El-Erian's full interview by clicking here. Also be sure to read up on Mohamed El-Erian's op-ed for Yahoo Finance addressing investor rotation in the tech sector and AI. To watch more expert insights and analysis on the latest market action, check out more Morning Brief.