Financial News: Sep 21 - Australia (5 stories)

Here is your Weekly summary for Business & Finance across Australia for Mon 15th September - Sun 21st September 2025

AI-selected stocks have surged over 150%, significantly outperforming the S&P 500 by 111%. This trend highlights the growing influence of artificial intelligence in investment strategies, potentially reshaping how investors approach stock selection and portfolio management.

In contrast, YPF shares plummeted by 48% after a warning from InvestingPro about their overvaluation, raising concerns about market corrections and investor confidence in energy stocks.

Meanwhile, Lennar's Q3 2025 earnings fell short of expectations, leading to a decline in its stock price, reflecting ongoing challenges in the housing market. Additionally, insider trading activity was noted as Dunlop A. Sinclair sold $713,000 worth of Apellis shares, while Saba Capital divested $637,000 in Nuveen Pennsylvania shares, indicating strategic repositioning by these investors.