RE: "the dive in stocks Starbucks took"

That works if you consider the loss of less than two-tenths of a percent a dive.

From Snopes:

Although the price of Starbucks stock fell slightly that day, however, the change mirrored a dip in prices across the stock market as a whole resulting from President Trump’s executive order on immigration, 
Fortune reported: President Donald Trump’s decision late on Friday to sign an executive order banning travel from seven predominantly Muslim countries to the United States for 90 days is causing a minor selloff as investors take gains after a post-election rally in stocks and the U.S. dollar.

On 30 January 2017, the day the #BoycottStarbucks hashtag went viral, Starbucks stock opened at $56.00 and closed at $55.90


I believe it's currently around $58.