Walgreens Boots Alliance (WBA -1.68%) caught the market by storm last week when it slashed its dividend by 48%, from $0.48 per share per quarter to $0.25. Now, Walgreens stock yields around 4%, which is still respectable, but far lower than the high yield investors were used to.You may be wondering why a lower dividend could be a good thing. After all, why would investors ever ask a company to give them less money? Here's why Walgreens' cut was the right decision, a look at how past dividend cuts helped oth ...