Compare the stock returns over 1, 2, 3, and 7 days after being mentioned in the tweet. Highlight any significant patterns or trends.
STOCK: AstraZeneca 1_DAY_RETURN: 0.0 2_DAY_RETURN: 0.0 3_DAY_RETURN: 0.0099044309296264 7_DAY_RETURN: 0.0311033883579496
The stock shows a consistent positive return trend over the specified periods.