GRANT PARK FUTURES FUND LIMITED PARTNERSHIP - FORM 8-K - EX-99.1 - WEEKLY COMMENTARY FOR THE WEEK ENDED MARCH 22, 2013

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8-K - FORM 8-K - GRANT PARK FUTURES FUND LIMITED PARTNERSHIP	f8k_032713.htm

EXHIBIT 99.1

Grant Park Fund Weekly Commentary

For the Week Ended March 22, 2013

Current Month				Rolling Performance*					Rolling Risk Metrics* (Apr 2008 – Mar 2013)
Class	Week ROR	MTD ROR	YTD ROR	1 yr Ann ROR	3 yr Ann ROR		5 yr Ann ROR	10 yr Ann ROR	Annualized ROR	Annualized Standard Deviation	Maximum Drawdown	Sharpe Ratio	Sortino Ratio
A	-0.9%	0.8%	-0.7%	-5.4%	-4.2%		-3.7%	1.9%	-3.7%	10.7%	-23.6%	-0.3	-0.5
B**	-0.9%	0.7%	-0.8%	-6.0%	-4.8%		-4.4%	N/A	-4.4%	10.7%	-25.7%	-0.4	-0.5
Legacy 1***	-0.8%	0.9%	-0.2%	-3.3%	-2.2%		N/A	N/A	-3.3%	10.7%	-18.4%	-0.3	-0.4
Legacy 2***	-0.8%	0.9%	-0.2%	-3.6%	-2.6%		N/A	N/A	-3.6%	10.7%	-18.9%	-0.3	-0.5
Global 1***	-0.8%	1.0%	0.0%	-2.7%	-2.8%		N/A	N/A	-4.1%	10.3%	-17.7%	-0.4	-0.5
Global 2***	-0.8%	0.9%	-0.1%	-2.9%	-3.1%		N/A	N/A	-4.4%	10.2%	-18.7%	-0.4	-0.6
Global 3***	-0.9%	0.8%	-0.5%	-4.5%	-4.8%		N/A	N/A	-6.1%	10.2%	-24.0%	-0.6	-0.8

S&P 500 Total Return Index****	-0.2%	2.9%	9.7%	13.0%		12.4%	5.6%	8.4%	5.6%	18.9%	-46.4%	0.4	0.4
Barclays Capital U.S. Long Gov Index****	1.5%	-0.5%	-2.7%	7.0%	12.2%		8.2%	7.2%	8.2%	13.3%	-12.3%	0.7	1.1

*	Performance metrics are calculated using month-to-date performance estimates. All performance data is subject to verification.
**	Units began trading in August 2003.
***	Units began trading in April 2009.
****	Index is unmanaged & is not available for direct investment. Please see Indices Overview (below) for more information. Weekly RORs are calculated using data acquired through Bloomberg.

Portfolio Positions by Sectors and Markets (Two largest positions within each sector)

	Portfolio for A, B and Legacy units					Portfolio for Global units
Sector	Sector		Market			Sector		Market
Sector	Exposure	Position	Contract	Exposure	Position	Exposure	Position	Contract	Exposure	Position
COMMODITIES	25%					25%
Energy	7%	Long	Natural Gas	3.4%	Long	7%	Long	Natural Gas	3.4%	Long
Energy	7%	Long	Gasoline Blendstock	2.1%	Long	7%	Long	Gasoline Blendstock	2.0%	Long
Grains/Foods	13%	Short	Sugar	2.2%	Short	13%	Short	Sugar	2.2%	Short
Grains/Foods	13%	Short	Coffee	2.0%	Long	13%	Short	Coffee	2.0%	Long
Metals	5%	Short	Copper	2.4%	Short	5%	Short	Copper	2.3%	Short
Metals	5%	Short	Aluminum	1.1%	Short	5%	Short	Aluminum	1.1%	Short
FINANCIALS	75%					75%
Currencies	25%	Short $	Australian Dollar	4.4%	Long	25%	Short $	Australian Dollar	4.4%	Long
Currencies	25%	Short $	British Pound	3.5%	Short	25%	Short $	British Pound	3.4%	Short
Equities	30%	Long	S&P 500	4.6%	Long	30%	Long	S&P 500	4.6%	Long
Equities	30%	Long	Dax Index	3.0%	Long	30%	Long	Dax Index	3.0%	Long
Fixed Income	20%	Long	Bunds	4.7%	Long	20%	Long	Bunds	4.6%	Long
Fixed Income	20%	Long	Bobl	2.9%	Long	20%	Long	Bobl	2.9%	Long

Market Commentary (Largest price movements within each sector)

Sector/Market
Energy	Brent Crude Oil prices fell as the banking crisis in Cyprus put pressure on industrial demand forecasts. Natural gas prices gained more than 1% as colder-than-usual temperatures continued across the U.S.
Grains/Foods	Sugar prices fell following reports which raised expected supplies by more than 1 million tons above previous forecasts. Coal prices rose more than 2%, up from multi-month lows, as investors sought to take advantage of low prices.
Metals	Copper prices moved lower as the developing banking crisis in Cyprus added to already bearish sentiment regarding the global economic outlook. Nickel prices rose in excess of 1% following reports of increased demand for stainless steel in China.
Currencies	The Japanese yen reversed its recent downward trend and finished higher due to a lack of details regarding upcoming stimulus activity during a press conference with the Bank of Japan Governor. The British pound gained against counterparts due to reports of weak support for new stimulus during last week’s Bank of England meeting.
Equities	Global equity markets experienced sharp declines. Market losses were driven by fears surrounding the potential financial collapse in Cyprus. The largest declines occurred after the announcement of new withdrawal restrictions on the banking customers of Cyprus.
Fixed Income	European and U.S. fixed income markets rose as heavy safe-haven buying in the midst of Cyprus’ failing banking system supported prices.

ALL PERFORMANCE REPORTED IS NET OF FEES AND EXPENSES. PAST PERFORMANCE IS NOT NECESSARILY INDICATIVE OF FUTURE RESULTS. FUTURES TRADING INVOLVES A HIGH DEGREE OF RISK AND IS NOT SUITABLE FOR ALL INVESTORS. FUTURES TRADING INVOLVES A HIGH DEGREE OF RISK, INCLUDING LIQUIDITY RISKS, NO SECONDARY MARKET EXISTS, RESTRICTIONS ON REDEMPTIONS, AND THE RISK OF FOREIGN SECURITIES. THIS DOES NOT CONSTITUTE AN OFFER OF ANY SECURITY FOR SALE. OFFERING BY PROSPECTUS ONLY. INFORMATION IN THIS COMMENTARY IS DRAWN FROM VARIOUS SOURCES THAT ARE DEEMED TO BE RELIABLE. HOWEVER, THE INFORMATION IS NOT AUDITED BY DEARBORN CAPITAL. IN ADDITION, DEARBORN CAPITAL DRAWS UPON THIS INFORMATION TO MAKE ITS OWN ASSUMPTIONS WHICH COULD BE CONSIDERED DEARBORN CAPITAL’S OPINION. DEARBORN CAPITAL BELIEVES THAT ANY SUCH STATEMENTS OF OPINION HAVE A REASONABLE BASIS IN FACT.

Performance Chart

Barclays Capital U.S. Long Government Index (formerly Lehman Brothers U.S. Government Index: Long Subset): A benchmark comprised of the Barclays Capital U.S. Treasury and U.S. Agency indices. The U.S. Long Government Index includes Treasuries (public obligations of the U.S. Treasury that have remaining maturities of more than ten years) and U.S. agency debentures (publicly issued debt of U.S. Government agencies, quasi-federal corporations, and corporate or foreign debt guaranteed by the U.S. Government). The U.S. Government Index is a component of the Barclays Capital U.S. Government Index.

Compounded Annualized Rate of Return (ROR): This is the geometric 12-month mean that assumes the same rate of return for each 12-month period to arrive at the equivalent compound growth rate reflected in the actual return data.

Standard and Poor’s 500 Total Return Index (S&P 500 Index): A weighted index of the 500 stocks in the S&P 500 Index, which are chosen by Standard and Poor’s based on industry representation, liquidity, and stability. The stocks in the S&P 500 Index are not the 500 largest companies; rather the index is designed to capture the returns of many different sectors of the U.S. economy. The total return calculation includes the price-plus-gross cash dividend return.

Risk Metrics Chart

Drawdown: A drawdown is any losing period during an investment’s performance history. It is defined as the percent retrenchment from an equity peak to an equity valley. Maximum drawdown is simply the largest percentage drawdown that has occurred during the specified time frame. Grant Park’s drawdowns are computed based on month-end equity values.

Sharpe Ratio: A return/risk measure defined as the average incremental return of an investment over the risk free rate.

Sortino Ratio: A ratio developed to differentiate between good and bad volatility. The calculation provides a risk-adjusted measure of performance without penalizing for upward price changes.

Standard Deviation: Measures the dispersal or uncertainty in a random variable (in this case, investment returns). It measures the degree of variation of returns around the mean, or average, return. The higher the volatility of the investment returns, the higher the standard deviation will be. For this reason, standard deviation is often used as a measure of investment risk.

GRANT PARK FUTURES FUND LIMITED PARTNERSHIP - FORM 8-K - EX-99.1 - WEEKLY COMMENTARY FOR THE WEEK ENDED MARCH 22, 2013 - March 27, 2013

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