At times, analyst change-ups on the stocks they cover can fall victim to poor timing. Such was the case with a major bank's revised take on up-and-coming cybersecurity company SentinelOne (S 3.30%). Just after news of the bank's recommendation upgrade and price target raise, another prominent cybersecurity business published dispiriting quarterly results.This awkward timing raises the enticing possibility, however, that some titles in the sector might become undervalued.Bank of America becomes a SentinelOne ...