Alphabet shares fell 10% in premarket trading. A close down more than 9.77% would mark its worst post-earnings reaction since its 2004 listing. Third-quarter free cash flow was negative $9.07 billion versus the negative $2.70 billion analysts expected, while search advertising revenue rose 12% to $63.35 billion but missed estimates. Alphabet maintained full-year capital expenditure guidance of $195 billion to $205 billion.