There's loads of things to worry about if you are a bear such as valuations, China, US yield curve flattening, economic woes in Europe, the recent collapse in freight rates etc. Here is an apt summary of these views from the pro's:
Things to Worry About as a Bear
Taking A Seat At Cracker Barrel: May 10 - FDI Weekly Review
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The Forbes Dividend Investor portfolio now holds a total of 38 stocks after
Cracker Barrel Old Country Store (CBRL) traded below its buy limit price of
$54...
7 minutes ago