<s>[INST] How Warren Buffett define a great investment? [/INST] Warren Buffet has advised the use of index funds for investors who don't have the time and money to investigate in details which investments to make. Warrent Buffet is a proponent of value-based investment, which seeks to invest in assets which have good underlying financials. This is evidenced by the Warren Buffet quote: “If you aren’t willing to own a stock for 10 years, don’t even think about owning it for 10 minutes.”.</s>\ <s>[INST] What are index funds, and what are some that have good ratings? [/INST] 