In order to get $150, go to Motif Investing and open an account with them. According to their web site:
Invest in a wealth of ideas
Now you can invest in the trends, issues, and values that matter to you—from clean technology and connected cars, to the fight against cancer. Step up to a new world of investing, built around you.
Customized portfolioChoose from 150+ professionally built motifs based on a theme, or build one based on your own interests
Maximized returnsTrade up to 30 stocks in a motif for just $9.95. Enjoy low commissions, and no ongoing fees.
The ultimate controlSee and understand exactly what you own, with one-click trades, advanced tools, and a user friendly platform to elevate your portfolio.