March Madness is still a few weeks away for college basketball fans but the madness of March is in full swing for the oil sector. Turmoil in the Middle East sent oil prices up more than 6 percent last week. We also happen to be entering a time of year that has historically been good for energy prices and energy equities in recent decades.

Going back nearly 30 years, March has been the best month for crude oil. By the end of the month, the price of oil is nearly 4 percent higher on average than the closing price on the last trading day of February.

One reason for this increase relates to the demand pull created by refiners ramping up in advance of the summer driving season. You can see in the above chart that crude prices generally spike in March then continue at a lesser pace through the early summer before picking up again in the late summer. There is typically a big decline from September to October and weak price performance through year end.

This year, oil prices jumped the gun on the seasonal rise because of the unrest in Libya and fears that it may spread to key producers such as Iran, Algeria, Nigeria and Saudi Arabia. Crude oil prices reached $104 per barrel today and we expect this near-term volatility to continue as the geopolitical situation works itself out.

Short-term volatility aside, oil market supply/demand fundamentals were tightening before the turmoil in the Middle East began and we think historically high oil prices are here for the long-term. On Tuesday, the International Energy Agency's chief economist Fatih Birol supported this opinion when he indicated that "the age of cheap oil is over."

PIRA, an oil industry analyst, is forecasting West Texas Intermediate (WTI) oil prices will hover around $104 per barrel in 2011 based on tighter oil supply/demand fundamentals, strong medium-term fundamentals and increased financial investment. The firm expects oil demand to grow by 1.6 million barrels per day in 2011 as global GDP growth averages 4.3 percent. Meanwhile, OPEC's crude output is only expected to increase by 960,000 barrels per day.

Refiners are one of the energy sub-sectors that could benefit the most from higher oil prices. Historically March marks the end of a five-month stretch in which monthly crack spreads (value of refined products minus the prices of the crude oil feedstock) tends to increase. Spreads are generally 4 percent wider in March than February.

This year, some refiners are getting an added bonus because of the significant price difference between WTI and Brent crude oil. Currently, Brent is trading about $15 a barrel higher than WTI, which means that some refiners are buying their oil $15 below global prices. This adds to the profitability of each barrel.

The discount may remain wide for the time being because crude oil supplies from Canada and the mid-continental region of the U.S. have risen faster than demand. These supplies travel to storage facilities at the delivery hub in Cushing, Oklahoma, which makes it difficult to be exported overseas. This creates a supply glut unique to the region.

This is a very positive development for a sub-group that has struggled over the past few years. You can see from the chart that refiners have lagged the rest of the oil and gas sector over the past three years. While the S&P Energy Index is returning to peak 2008 price levels, the S&P Oil and Gas Refining and Marketing Index is barely halfway back.

During this madness of March, the increased profitability gives refiners some catch-up potential with the rest of the energy sector. For these reasons, refiners remain an area of focus for the Global Resources Fund (PSPFX).

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Please consider carefully a fund's investment objectives, risks, charges and expenses. For this and other important information, obtain a fund prospectus by visiting www.usfunds.com or by calling 1-800-US-FUNDS (1-800-873-8637). Read it carefully before investing. Distributed by U.S. Global Brokerage, Inc.

Foreign and emerging market investing involves special risks such as currency fluctuation and less public disclosure, as well as economic and political risk. Because the Global Resources Fund concentrates its investments in a specific industry, the fund may be subject to greater risks and fluctuations than a portfolio representing a broader range of industries.

All opinions expressed and data provided are subject to change without notice. Some of these opinions may not be appropriate to every investor. The S&P Oil & Gas Refining and Marketing Index tracks the market performance of downstream oil and gas companies. The S&P 500 Energy Index is a capitalization-weighted index that tracks the companies in the energy sector as a subset of the S&P 500.