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: 0.002880599164626 2_DAY_RETURN: 0.0030246291228574 3_DAY_RETURN: 0.0030246291228574 7_DAY_RETURN: 0.0283739017715684
The stock shows a consistent positive return trend over the specified periods.