Lifting Disappointing Debut Looms Big in Uber's Upcoming Mega-IPO

Uber Technologies Inc., which stands up for its landmark IPO this week, has taken steps to avoid setbacks that made the debut competitor Lyft Inc. a disappointment.

Among other things, Uber has trimmed its valuation and is now targeting $ 80 billion and $ 90 billion. It is as if Lyft shares have tumbled more than 20% from the peak on the day they started trading in March.

Uber …