What caused Costco's other item fluctuations recently?

The stock price of Costco has experienced a decrease of 0.97% on March 28. Recently, the stock price of Costco has been affected by several factors:

1. **Economic Concerns and Tariffs**: The overall market sentiment, influenced by concerns over the economic impact of tariffs, has affected Costco's stock price. The anticipation of reciprocal tariff hikes by the US administration has weighed on the market, including Costco.
2. **Insider Transactions**: On March 18, 2025, Caton Frates, Executive Vice President at Costco Wholesale Corp, sold 850 shares of the company. This insider transaction could signal a lack of confidence in the company's short-term performance, which may influence investor perceptions and contribute to stock price fluctuations.
3. **Market Dynamics and Sector Performance**: The broader market dynamics, including the performance of sectors like technology and consumer staples, can impact Costco's stock price. For example, the sector-specific funds saw outflows for the second week in a row, with $3.25 billion in net sales, indicating a potential sector-wide weakness that could affect Costco.

In summary, Costco's stock price fluctuations are influenced by a combination of economic concerns, insider transactions, and market dynamics.