Charted: $1.4 billion lesson

For SoftBank, the collapse of WeWork has delivered what the company's own leaders acknowledge is a costly lesson, Nathan writes.

• The Japanese investment firm today said it stomached a loss of ¥234.4 billion (about $1.4 billion) on the investment in the past quarter.
• The co-working space company filed for bankruptcy protection on Monday — a stunning fall from grace for a company once valued at $47 billion.

State of play: The blow contributed to SoftBank's $6.2 billion loss for the quarter.

• "As a company, we need to accept this reality and also need to learn the lesson from this for our future investment activity," SoftBank executive Yoshimitsu Goto said on an earnings call.