Airbnb opens at $146, up from its $68 IPO price, on its first day of trading after raising $3.5B at a valuation of $47.3B (Lauren Feiner/CNBC)

Lauren Feiner / CNBC:

Airbnb opens at $146, up from its $68 IPO price, on its first day of trading after raising $3.5B at a valuation of $47.3B  —  – Airbnb is set to double its share price in its IPO debut on Thursday.  — Shares were priced at $68 on Wednesday and are now expected to reach about $153 when it starts trading.