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: -0.0047110552763819 2_DAY_RETURN: 0.0028266331658292 3_DAY_RETURN: 0.0028266331658292 7_DAY_RETURN: -0.0173785594639865
The stock shows a consistent negative return trend over the specified periods.