A liquidity crunch in China could present a headwind for investors, Dennis Gartman of The Gartman Letter said Monday.
"I'm still bullish of stocks. Stocks are going to go higher. But if there's something that I'm concerned about, it is China," he said. "The liquidity crunch is very serious. Usually, these things resolve themselves in a very benign manner. Usually, these problems just disappear after the turn of the year. But if you have to be concerned about something, be concerned about the fact that short-term rates in China have risen several hundred basis points. It's happened in the past. It's going to happen again."
On CNBC's "Fast Money," Gartman said that he was also concerned about the dispute between China and Japan over the uninhabited Senkaku Islands in the East China Sea.
(Read more: Expect 'a rude awakening' for commodities: Ed Morse)