Compare the stock returns over 1, 2, 3, and 7 days after being mentioned in the tweet. Highlight any significant patterns or trends.
STOCK: Shell 1_DAY_RETURN: 0.0 2_DAY_RETURN: 0.0128816793893129 3_DAY_RETURN: 0.0162213740458015 7_DAY_RETURN: -0.0062022900763358
The stock shows a consistent negative return trend over the specified periods.