Compare the stock returns over 1, 2, 3, and 7 days after being mentioned in the tweet. Highlight any significant patterns or trends.
STOCK: GSK 1_DAY_RETURN: -0.0021237864077669 2_DAY_RETURN: -0.0051577669902912 3_DAY_RETURN: -0.0051577669902912 7_DAY_RETURN: -0.0015169902912621
The stock shows a consistent negative return trend over the specified periods.