Compare the stock returns over 1, 2, 3, and 7 days after being mentioned in the tweet. Highlight any significant patterns or trends.
STOCK: American Express 1_DAY_RETURN: -0.0035374751271279 2_DAY_RETURN: -0.0107229714791067 3_DAY_RETURN: -0.0195666592969267 7_DAY_RETURN: -0.0227724961308864
The stock shows a consistent negative return trend over the specified periods.