da-kuk Palo Alto Networks (PANW) plunged post-earnings last week. The once high-flying cybersecurity stock fell from near $380 to about$260 peak to trough in February. Shares have since bounced as investors re-assessed the situation. Such major corrective moves are not uncommon following meteoric rises in key investment themes in volatile niches. For many investors, a more diversified portfolio of industry companies can help buffer against such seismic single-stock drops. Let's dig into a lesser-known cybe ...