Stock shares, however, rise.
Shares rise for subsidiary of Marathon.
Up 83 percent over last year.
Investors work through new batch of mixed company earnings.
Apple soars 7 percent; Twitter plunged 15 percent.
Notes stronger job growth, shrinking risks.
Market rally earlier this month has given investors pause.
Yahoo slips after announcement of Verizon deal.
It surpassed its prior record set Wednesday.
Bezos now third behind Gates, Ortega