By Joshua Franklin (Reuters) - Blackstone Group LP, the world largest alternative asset manager, has so far raised over $22 billion for its latest flagship private equity buyout fund, a person familiar with the matter said on Wednesday. The New York-based firm, led by cofounder Steve Schwarzman, expects to conclude the fundraising later this year for its eighth buyout fund, said the source, requesting anonymity as the details are private The post Blackstone raises $22-billion fund, its largest ever: source appeared first on Firstpost.