The maintenance of a Sell rating suggests that Goldman Sachs does not see positive momentum or significant upside in Kronos Worldwide's stock. However, the increase in the price target from $7 to $8 indicates a slightly more positive outlook than before, potentially due to some improved fundamentals or market conditions. Despite the raised target, the Sell rating is likely to have a more dominant effect on investor sentiment, potentially leading to a negative short-term impact on the stock price.