Nikkei ends down after wild ride on BOJ decision
Jung Yeon-Je | AFP | Getty Images. Major markets in Asia closed mostly lower on Friday after wavering between positive and negative territory as investors focused on economic data, central bank decisions and commodity prices. · CNBC

Major markets in Asia closed mostly lower on Friday after wavering between positive and negative territory as investors focused on economic data, central bank decisions and commodity prices.

The Japanese market took a wild ride, erasing early losses and spiking higher briefly after the Bank of Japan said it will increase purchases of exchange-traded funds (ETFs), before retreating back into negative territory.

The BOJ kept monetary policy unchanged as expected, but the central bank announced a new program to purchase ETFs at annual pace of 300 billion yen ($2.45 billion). This is in addition to the bank's existing ETF purchase program which increases ETF holdings at an annual pace of about 3 trillion yen.

During Asian trading hours, West Texas Intermediate (WTI) futures shed 7 cents, or 0.2 percent, to $34.88 a barrel, near a seven-year low. The internationally traded Brent was up 17 cents, or 0.46 percent, at $37.24 a barrel, after falling close to an 11-year low in overnight trade.

Angus Nicholson, market analyst at spreadbetter IG, said in a note that sustained uplifts in oil prices are unlikely until there are consistent declines in oil inventories.

"Crude storage has not yet reached capacity and with contango at such dramatic levels there is little incentive to sell into the spot market," he said, adding, "A wave of defaults and bankruptcies in the energy sector still looks likely to come, and these concerns are certainly weighing on markets."

Contango means the current price of a commodity is lower than prices for delivery in the future.

Spot gold (Exchange: XAU=) rose 0.53 percent to $1,057 an ounce after losing as much as 2.4 percent overnight, hovering close to a six-year low.

Energy plays in Australia closed mixed, with stocks of Santos (ASX: STO-AU), Woodside Petroleum (ASX: WPL-AU) and Oil Search (ASX: OSH-AU) closing down between 0.22 and 1.31 percent.

Japan's Inpex (Tokyo Stock Exchange: 1605.T-JP) and Japan Petroleum (Tokyo Stock Exchange: 1662.T-JP) saw losses of 2.6 and 2.46 percent respectively by the market close. South Korean oil refineries ended mostly in the red. Shares of S-Oil (Korea Stock Exchange: 1095-KR), SK Innovation (Korea Stock Exchange: 9677-KR), and GS Holdings closed down between 1.17 and 2.59 percent.

Chinese energy plays CNOOC (Hong Kong Stock Exchange: 883-HK), PetroChina (Shanghai Stock Exchange: 1857-SZ) and Sinopec (Shanghai Stock Exchange: 688-SZ) traded down between 0.64 and 2.5 percent.

Gold miners Newcrest (ASX: NCM-AU), Evolution Mining (ASX: EVN-AU) and Alacer Gold (Toronto Stock Exchange: ASR-CA) saw heavy losses, falling 1.89 to 4.73 percent.