Casting an ominous shadow on the company was Steve Jobs' announcement in early 2009 of a six-month medical leave. While Jobs was on leave, chief operating officers Tim Cook handle Apple's day-to-day operations. Some analysts thought Jobs might transition into an advisory, and Cook would formally become CEO. Collins Stewart analyst Ashok Kumar said investors were reassured that Jobs would be back at the helm of the company he helped resuscitate over the past decade with successful products such as iPod, phone, and iPad.9