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: -0.0047619047619047 2_DAY_RETURN: -0.0078977932636468 3_DAY_RETURN: -0.0080139372822299 7_DAY_RETURN: -0.0085946573751451
The stock shows a consistent negative return trend over the specified periods.