On CNBC's "Mad Money Lightning Round," Jim Cramer said Sunnova Energy International Inc (NYSE:NOVA) is a tough stock to own because solar stocks are going down. He would stay away from Sunnova.

Alibaba Group Holding Ltd - ADR (NYSE:BABA) has come down a lot and Cramer is a buyer at its current price.

Cramer likes BHP Group Ltd (NYSE:BHP).

Virtu Financial Inc (NASDAQ:VIRT) is a very good financial company and it should be selling at a higher price, said Cramer. He would be a buyer of the stock.

JD.Com Inc (NASDAQ:JD) is almost as good as Alibaba and it is worth holding, said Cramer. He added that it's necessary to understand the trade war and the risks of investing in China.