Potential Loss of Patent Protection crushes a positive day. PDS wrecked by almost 18%

Biden's lack of support for covid vaccine patents turned a very strong green day into another harsh red sell-off.

Fully 21 stocks fell and five gained ground. The average was a 2.8% loss.

IBio was as high as a 28% gain, but it was halved by the end of the session, up just under 15%.

The biggest loser was PSD Bio, falling just under 18%. Vaxart's yo-yo continued, this time falling just under 16%. Onco Sec was next biggest loser, falling over 8%.  CureVac continues to buckle, falling another 7%. Moderna fell 6% and Novavax fell 5%.