It’s been a rough year in the stock market for growth investors. The leadership has been narrow, and many stocks that break out go nowhere. But at least three Sector Leaders have broken out and made headway: Palo Alto Networks (PANW), Synaptics (SYNA) and Avago Technologies (AVGO). Palo Alto Networks has made the most progress. It’s been tracking along the north side of its 50-day moving average since the summer of 2014.