plus, interviews with jack bogle and ken mullis. kicks off a special series on the future of investing. up next, more of the week's top business stories. >> we believe this company is rotten to the core. >> this is bloomberg. ♪ ♪ >> this is "bloomberg best." i am michael mckee. let us continue our global tour of the top business stories with a momentous merger bringing together a drugstore chain and a health insurer. cbs will acquire health insurer aetna for $67.5 billion. that will transform the health care industry in the united states. >> it will essentially condense a huge part of the supply chain existing between, you know, patients on one end and their money on the other. will have is an insurer combined with a drug benefits manager combined with a retail pharmacy that also runs a lot of clinics and other stores. you are really taking a lot of pieces that exist and almost essentially making middlemen in the health care supply chain and combining them into one big piece. it will resemble something like unitedd health care -- he