Warren Buffett

Berkshire Hathaway Inc. (BRK.A; BRK.B) reported its Q2 and first-half 2025 results. Net earnings attributable to Berkshire shareholders were $12.37 billion for Q2 2025, compared to $30.35 billion in Q2 2024. First-half 2025 earnings were $16.97 billion, down from $43.05 billion in 2024. The results include investment gains/losses and, for the second quarter and first half of 2025, an other-than-temporary impairment of investment in Kraft Heinz. Further details are available in the company’s 10-Q filing.

Warren Buffett, 94, steps back from public investing as developer Virattt launches “AI Hedge Fund,” an open-source simulator channeling strategies from nine legendary investors, including Buffett’s value principles and Graham’s frameworks. Tests showed a 14% return from a simulated $1M AAPL short (April 30-May 5) but mixed accuracy across FAANG+Tesla stocks (80% for single strategies, 60% for hybrid models). While praised for educational transparency in exposing financial metrics, the platform warns against commercial use due to data costs, model inconsistencies, and risks of algorithmic overreliance. LLM-based committee hybrids face alignment challenges, echoing historical quant fund pitfalls.