Core Viewpoint - The concept of "diversification" in investment portfolios has diminished in significance due to the rise of indexing, yet investors continue to seek it out [1] Group 1: ETF Performance and Correlation - The five largest tech-focused ETFs (QQQ, XLK, VGT, FTEC, SMH) have become highly correlated, leading to a lack of true diversification [2][8] - As of late March 2026, these ETFs have transformed into variations of the same trade, making them vulnerable to similar risks [2] - The tech market is dominated by a small number of mega-cap companies, resulting in minimal differentiation among these ETFs [3] Group 2: Key Statistics of ETFs - The market capitalizations of the ETFs are as follows: QQQ at $386.83 billion, XLK at $86.71 billion, VGT at $106.53 billion, FTEC at $15.50 billion, and SMH at $43.12 billion [4] - The 1-year returns for these ETFs are: QQQ at 19.41%, XLK at 25.61%, VGT at 24.43%, FTEC at 24.76%, and SMH at 74.25% [4] - The 5-year returns show significant performance differences, with SMH at 212.00%, indicating higher volatility and risk associated with semiconductor stocks [5][4] Group 3: Risk and Volatility - The Vaneck Semiconductor ETF (SMH) has a 60-month beta of 1.52, indicating it has been 50% more volatile than the S&P 500 Index over the past five years [5] - The R-Squared levels for XLK, VGT, and FTEC are between 97%-99% in relation to QQQ, suggesting that their performance is largely explained by QQQ's movements [7]

Core Insights - Exchange-traded funds (ETFs) are highlighted as effective investment strategies for 2026, providing instant diversification at a low cost [1] - There are over 14,000 ETFs available, catering to various investment preferences, including index funds and thematic ETFs [2] Best-Performing ETFs - The top-performing ETFs over the past year include the SPDR Gold Shares ETF (GLD), the Physical Platinum ETF (PPLT), and the Vaneck Semiconductor ETF (SMH), each showing gains of over 50% [3] - The SPDR Gold Shares ETF (GLD) has $148.2 billion in assets under management and an expense ratio of 0.4%, reflecting the performance of gold bullion [4] - The Abrdn Physical Platinum Shares ETF (PPLT) is similar to GLD and managed by Aberdeen, which reverted to its original name in March 2025 [7]