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: -0.0015328019619865 2_DAY_RETURN: -0.0128755364806867 3_DAY_RETURN: -0.0263641937461679 7_DAY_RETURN: -0.044757817290006
The stock shows a consistent negative return trend over the specified periods.