<prompt> Human: An example: Investing in the company that makes the solar panels, then investing in the company that installs those panels, etc.. Almost like investing in the complementary goods for an entire supply chain.Assistant: No. Highly concentrated sector bets are not a good idea.Human: Thanks for your response. I can think to myself why it wouldnt be a good idea. But, isnt it unlikely that all of the chain would fail? And, if you have some connection between your stocks does it not allow more effective gainloss management?  <response>: But, isnt it unlikely that all of the chain would fail?Its even less likely that all the companies in a broad market index fund will fail.And, if you have some connection between your stocks does it not allow more effective gainloss management?No. It probably makes it even more difficult to separate your emotions from your investments. 