Amazon last week stunned Wall Street by releasing third-quarter earnings that blazed past consensus estimates on the strength of its growing cloud services business and surprisingly strong response to its efforts to boost membership in its Prime program. Shares were up almost 7 percent to $601.72 in late trading Friday, after reaching as high as $619.94 for the day. Net income was $79 million in the quarter, or 17 cents a share, compared with a net loss of $437 million, or 95 cents a share, in the year-ago quarter.