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: 0.014585764294049 2_DAY_RETURN: 0.0139050952936599 3_DAY_RETURN: -0.0021392454297938 7_DAY_RETURN: -0.0122520420070012
The stock shows a consistent negative return trend over the specified periods.