Compare the stock returns over 1, 2, 3, and 7 days after being mentioned in the tweet. Highlight any significant patterns or trends.
STOCK: Citigroup 1_DAY_RETURN: 0.0115346038114342 2_DAY_RETURN: -0.0071882313607489 3_DAY_RETURN: -0.0066867268472082 7_DAY_RETURN: -0.0292544299565362
The stock shows a consistent negative return trend over the specified periods.