European stocks were slightly higher as traders assessed US economic data.

The recent stock upgrades that were fueled by China's reopening may already be over. The dust has barely settled on the situation, but it looks like the rally may be done.

Land & Buildings isn't Six Flags' only activist, or its biggest. Last month, H Partners Management LLC amended its cooperation agreement with Six Flags to increase its ownership of the theme-park operator's common stock to 19.9%. H Partners Management LLC is the company's largest shareholder.