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: 0.0039859102706711 2_DAY_RETURN: -0.0054690396737114 3_DAY_RETURN: -0.0166852057842046 7_DAY_RETURN: -0.0203930292918056
The stock shows a consistent negative return trend over the specified periods.