Nvidia’s rebound adds $420 bn market value , shares surge 17% in 4 sessions

It’s been a rough six weeks for Nvidia Corp. shareholders. A historic dip that erased record market value from the company was followed by a four-day stretch of stomach-churning volatility. Now, though, signs are emerging the worst might be over.

The chipmaker’s shares have surged 17 per cent in the past four sessions, adding nearly $424 billion in market value to one of the biggest companies in the world. The rebound has propelled the broader market higher as well, with Nvidia accounting for roughly 22 per cent of the S&P 500’s gain over that span, double the contribution of any other single stock.