Trump's 3711 stock trades prompt scrutiny: automated portfolio adjustments, tax loss harvesting, or something else?

The latest financial disclosure documents of President Trump in the United States are under scrutiny due to the astonishing scale of the transactions: a total of 3711 transactions, almost all of which are stocks of US companies, many of whose fortunes may be affected by federal policies. Overall, these transactions form an unprecedented round of stock market operations by a sitting US president, attracting strong interest from short-term traders and prompting critics to raise suspicions of insider trading. However, evaluations of these transactions and interviews with investment experts show that the trading methods are complex and varied, making it difficult to make clear judgments. The patterns exhibit characteristics of multiple investment portfolio management strategies layered on top of each other, often based on indices, and a large part of them may be automatically executed, making them difficult to decipher. To a large extent, this aligns with the Trump Group's public explanation of the matter. The group states that Trump's positions are independently managed by third-party financial institutions, which make all investment decisions including asset allocation, trading, rebalancing, and portfolio management. The transactions are executed through "automated, model-driven investment portfolios and direct indexing strategies," in which Trump, his family, and his company are not involved.