I’m 35, an investing newbie and putting 10% of my salary in a 401(k) — should I just put everything in the S&P 500?

Core Insights - Investments in the stock market are essential for retirement portfolio growth, with a focus on proper diversification [1] - The S&P 500 index is highlighted as a viable investment option for individuals lacking advanced market knowledge [2] Investment Strategy - The S&P 500 tracks around 500 of the largest companies across various sectors, providing automatic diversification [3] - Historically, the S&P 500 has delivered an average annual return of 10%, making it a recommended choice by notable investors like Warren Buffett [3] Financial Projections - If Charlie invests 10% of his salary for 32 years, with a 10% return and full employer match, he could accumulate approximately $2,601,339.23 for retirement [4] - This projected amount exceeds the retirement savings estimates for Millennials and current retirees, who anticipate needing $1 million and $1.46 million, respectively [4] Retirement Income - By withdrawing 4% annually from his retirement savings, Charlie could generate an income of $104,054 in his first year of retirement, adjusted for inflation [5]