San Francisco ? Yahoo Inc. founder Jerry Yang has never concealed how much he cares about his Internet company.

His emotional attachment is one of the reasons he balked at a $47.5 billion takeover offer from Microsoft Corp. six months ago. The same devotion finally led Yang to conclude he should step aside as chief executive, as the company seeks to bolster its depressed stock price and sagging earnings in an economic downturn that might prove even more wrenching than the dot-com bust of eight years ago.

Yang’s surrendering of the CEO reins, announced Monday, won’t occur until Yahoo finds a suitable replacement. The Sunnyvale-based company said it is interviewing candidates inside and outside Yahoo in a search led by its chairman, Roy Bostock, and the executive recruitment firm Heidrick & Struggles.