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: -0.0149013878743607 2_DAY_RETURN: -0.0149013878743607 3_DAY_RETURN: -0.0149013878743607 7_DAY_RETURN: -0.0343316289262236
The stock shows a consistent negative return trend over the specified periods.