This week, we've been covering how technology has changed investing and will continue to change it. That conversation leads us to artificial intelligence. A Wall Street industry poll earlier this year said a majority of hedge funds are now using artificial intelligence and machine learning to help them make trades. Huge quant funds are even fighting Google and Facebook for engineers to crunch tons of data and build algorithms to predict the next great stock buy. This has all made markets faster, more efficient and more accessible to online investors. On the other hand, there are some worrying aspects. We dig into that in Quality Assurance, our Friday segment where we take a deeper look at a big tech story. Host Molly Wood talks with Simone Foxman of Bloomberg. (09/21/18)