By Bret Kenwell Johnson & Johnson stock is hitting all-time highs on earnings. Is the stock a buy? Shares of Johnson & Johnson (JNJ) – Get Johnson & Johnson Report are trading higher on Tuesday, up about 4% and hitting all-time highs in the process. The move comes after the company reported earnings before the open. Earnings came in ahead of expectations, while revenue slightly missed analysts’ estimates. Further, J&J gave its dividend a 6.6% boost, now yielding almost 2.5%. As reported previously at TheStreet, Johnson and Johnson also “lowered its full-year profit forecast, and suspended its …