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
Miley Cyrus Seems To Have Another Smash Hit On Her Hands
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Miley Cyrus and Beyoncé's collaboration "II Most Wanted" from Cowboy Carter
dominates the U.S. iTunes chart, and it's poised for Hot 100 success.
10 minutes ago