The Biggest One Day Stock Gain In History I wrote recently about the biggest single stock drop in history, which happened to $FB earlier this year. In some ways, it’s more interesting to think about huge drops than gains. Maybe its a sense of schadenfreude. But the biggest one day gain came a single day after $FB’s plummet. Off of a strong earnings report and an announced acquisition, $AMZN saw a 13% climb in one single day. 13% is impressive for any company, but for one as massive as $AMZN it means a whole lot more than percentages. The 13% rise equated to an increase of $191 billion in valuation. Imagine how happy Jeff Bezos was. Because we’re seeing more and more mega-valued corporations, both the $FB plummet and $AMZN surge are likely to be broken sooner than one might think. $AMZN’s record busting gain bested the previous gain by $AAPL—which happened a mere week earlier. What stock will take off next?