Operating at a higher capacity is generally a positive indicator of both operational efficiency and market demand. For LyondellBasell, this move suggests confidence in their operational capabilities and in the demand for refinery products. This could lead to increased revenues and potentially higher profits, which are positive signals for investors. The direct mention of the Houston refinery's operational plans makes this news highly relevant to LYB, and the impact on the stock price is likely to be positive in the short term as investors react to the company's operational goals and potential for increased earnings.