Apple falls after CEO Tim Cook lowers revenue guidance for the 1st quarter. Bristol-Myers Squibb gives Celgene shareholders $74 billion reasons to smile. MFAM Funds portfolio manager Bill Barker analyzes the latest headlines and what it means for investors. Plus, we dip into the Fool Mailbag to discuss investing for your (adult) children. (Tangents include company rebranding fails, Harry Potter’s effect on today’s mega-merger, and why Bill hasn’t been in the studio in awhile.)