Group 1 - The article discusses the investment opportunities in index funds and offers a free course on investment techniques for index funds [2] - It highlights the importance of understanding how to invest in index funds to achieve good returns [2] Group 2 - The article introduces Real Estate Investment Trusts (REITs) as a diverse asset class that includes commercial real estate and infrastructure [7] - REITs provide stable cash flow income through rental income, with approximately 90% of received rent distributed to investors as dividends [7] - The long-term performance of REITs is compared to the S&P 500, with the REITs index achieving an annual compound return of 11.77% from 1971 to 2021, while the S&P 500 achieved approximately 11.13% [8] - The Vanguard REITs index fund, launched in 1996, has an annual compound return of 9.9%, slightly lower than the REITs index by 0.5% [8]