The price of crude oil broke below $50 a barrel last week as commodity and energy ETFs continued on a downward spiral.

The

United States Oil Fund

(USO) - Get Report

has fallen 67% since crude hit a record of $147 a barrel in July. Natural gas has also taken its share of hits in recent months. The

United States Natural Gas Fund

(UNG) - Get Report

has plummeted 58.5% since July.

Other ETFs in the commodity and energy industries that are reeling include the

SPDR S&P Oil & Gas Exploration & Production ETF

(XOP) - Get Report

, the

SPDR S&P Oil & Gas Equipment & Services ETF

(XES) - Get Report

and the

Energy Select SPDR ETF

(XLE) - Get Report

, which have dropped 46.1%, 58.3% and 49.2% this year. These declines compare to a 47.7% retreat by the S&P 500.

After such precipitous drops in price, one has to wonder where the bottom is for some of the ETFs in this space. "Oil probably has at least another 10% to 15% of downside," said

Keith Springer

, president of Capital Financial Advisory Services, in an interview on Nov. 12, when oil was trading about $56 per barrel. "I would look for oil to close below $50 a barrel before I would buy it."

Tony Welch, a portfolio manager at

Sarasota Capital Strategies

who specializes in ETFs, also believes things could get worse before they get better for energy ETFs. "People need to understand that we are in a bear market," he said. "Energy is one of the more uncertain sectors right now."

Welch cautions against trying to pick a bottom in energy. "We are in unprecedented times," he said. "Some of the energy ETFs tend to look like they are bottoming out, but we need to see improvements, first in the general market and second in the sector. XLE is forming a technical wedge that could go either way."

Top holdings of XLE include

Exxon Mobil

(XOM) - Get Report

,

Chevron

(CVX) - Get Report

,

ConocoPhillips

(COP) - Get Report

,

Devon Energy

(DVN) - Get Report

and

Transocean

(RIG) - Get Report

.

Agriculture's allure

Joe Clark, managing partner at the

Financial Enhancement Group

, finds the

PowerShares DB Agriculture Fund

(DBA) - Get Report

to be one of the more attractive commodity ETFs. "We definitely believe DBA is the best way for an individual to get into the space," he said. "If I am going to bet on a commodity right now, I am going to bet on something that feeds me."

Clark cautions investors to be on the lookout for signs of deflation in the short term, especially in light of the declining price of oil. "A risk in a commodity culture is deflation," he said. "If a commodity price falls below the input cost, then you have to run for cover."

He notes that oversaturation would prove to be a major drag for commodities. "When there is deflation, all of the inventory is sold as quickly as possible," Clark said. "Such a scenario would flood the market and drive prices down."

Bailout factor

The TARP government program may have been initially intended to stabilize the financial markets, but Springer believes that, in time, it also could have implications for commodities. "Nobody knows for sure if it is going to work," he said. "If it does, we will see a lot of money flooding the market and then inflation could be our next problem."

For investors considering ETFs to protect against such an outcome, Springer likes the

PowerShares DB Commodity Index Fund

(DBC) - Get Report

, the

PowerShares DB Oil Fund

(DBO) - Get Report

and the

iPath Dow Jones-AIG Commodity Index Total Return ETN

(DJP) - Get Report

.

"Because of the amount of liquidity coming into the economy in the coming months, $700 billion from the U.S. and $600 billion from China, the economy will grow with tremendous inflation and, thus, demand for commodities," he said.

Welch agrees that there will be a continued demand for commodities, but notes there may be new sources. "We are always going to need energy," he said. "It may not always be oil, though. Clean energy is becoming more of a story with the new administration coming in."

At the time of publication, Fisher was long XES, XLE, XOP and UNG. He was short USO.