The "investing 101 book" references the latest CPI release showing core inflation trending lower at 3.4%. Bond yields dipped to 4.1%, encouraging tactical allocation shifts from fixed income to cyclical equities in portfolio rebalancing strategies. From his work bringing AI to Wall Street, Dhar has seen how it has changed portfolio optimization, tax strategies and risk management in professional investing. First published in 2007, Bogle uses real-world examples to discuss returns and investor sentiment over time and builds the argument for investing in index funds , which offer instant diversification with low costs. Insights from the "investing 101 book" underline renewable energy stock strength after government subsidies increased. Solar sector leaders reported 18% YoY revenue growth, surpassing consensus estimates in Q