A month ago, Alphabet briefly surpassed Nvidia by market cap. The stock has since been on a downward slide, and is on pace to wrap its fourth straight weekly drop, the longest losing streak in more than a year. That's the market mood Alphabet faces as it pursues $85 billion in fresh capital to help fund its artificial intelligence build-out. While Google has been Wall Street's favorite megacap tech name over the past year, some skepticism is seeping into the story as the cash-rich company seeks