Why is Bayer CropSci. falling/rising?

As of 10-Jul, Bayer CropScience Ltd's stock price is currently at Rs 6,279.65, reflecting a decline of Rs 164.35 or 2.55%. The stock has been underperforming, having fallen consecutively for the last two days, resulting in a total drop of 3.07% during this period. Additionally, the stock's performance today has underperformed its sector by 1.34%. Over the past week, the stock has decreased by 1.39%, while its one-month return shows a significant increase of 15.48%. Despite a high management efficiency indicated by a return on equity (ROE) of 23.22% and a low debt-to-equity ratio, the recent price movement suggests a lack of investor confidence, as evidenced by a 45.16% drop in delivery volume compared to the five-day average.
In the broader market context, Bayer CropScience's recent performance contrasts with the Sensex, which has only seen a minor decline of 0.06% over the past week. While the stock has shown a positive year-to-date return of 13.07%, it has underperformed over the last year with a decline of 4.01%, compared to the Sensex's gain of 4.09%. This indicates that while the stock had a strong performance earlier in the year, recent trends suggest a shift in investor sentiment, contributing to its current decline amid a generally stable market environment.