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: 0.0302507836990596 2_DAY_RETURN: 0.043730407523511 3_DAY_RETURN: 0.0793103448275862 7_DAY_RETURN: 0.0946708463949844
The stock shows a consistent positive return trend over the specified periods.