Business software maker Atlassian's shares soar in market debut

Atlassian's strong debut signals to investors that among the crop of 145 tech unicorns - venture-backed private companies worth $1 billion or more - there are still some that are not overvalued. The company's IPO raised $462 million after the shares were priced at $21 each, above the expected range of $19-$20. Sydney-based Atlassian, which makes collaboration and management software, was valued at $3.3 billion in its last private valuation.