When stocks are cruising at or nearing all-time highs, it reflects considerable bullishness with trends where buyers are in control. Stocks making new highs tend to make even higher highs, particularly when analysts' positive earnings estimate revisions are rolling in. That’s been precisely the case for Intuitive Surgical (ISRG) , SharkNinja (SN) , and DaVita (DVA) , all of which presently sport a favorable Zacks Rank and are trading near 52-week highs. Let’s take a closer look at what’s been driving the bu ...