Since this is an all stock deal, the price of PXD stock is now irrelevant.
Each share in PXD is now worth 2.3234 times Exxon’s stock price. So today, that means PXD is worth 2.3234x$105 = $246/share, not the $253 anymore. Each day that can/will change.
I can’t believe pioneer didn’t lock in some of the premium. Letting everything go solely based on XOM stock price is extremely risky for all the shareholders and anyone wanting to take risk has to wait until Exxon feels comfortable with closing…I’m sure this will be on a day when their stock is down!