Sell off before long weekend - Sorrento hit by 11% loss.

Sell-off before long weekend. Stocks fall 2.5% on average with only four gaining ground and 21 losing ground.

The biggest loser was Sorrento which gave back recent gains with a fall of 11%. 

Altimmune continued to plummet with a 7% lose while CureVac, Inovio and IBio both fell 5%.