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: 0.0012454493197931 2_DAY_RETURN: 0.0225138915501054 3_DAY_RETURN: 0.0225138915501054 7_DAY_RETURN: -0.0010538417321325
The stock shows a consistent negative return trend over the specified periods.