According to Barron’s this week….Aetna (AET) is turning a corner, and investors should buy shares…While DuPont (DD) is just in time to profit from the commodities boom…And Verizon’s (VZ) iPhone 4 stock-out could mean higher Apple (AAPL) revenue estimates…While the weekly also reports Apple (AAPL) may be getting ready to reinvent the television…Finally, Questcor (QCOR) is hopeful it’s Acthar for MS will offset Medicaid cuts.