https://www.reuters.com/article/us-robinhood-ipo/robinhood-aims-for-up-to-35-billion-valuation-in-u-s-ipo-idUSKBN2EP0XA >Robinhood Markets Inc is targeting a valuation of up to $35 billion in its U.S. stock market listing, the online brokerage, which was at the center of a retail-trading frenzy that gripped Wall Street this year, revealed in a filing on Monday.