485BPOS

SECURITIES AND EXCHANGE COMMISSION

Washington, D. C.  20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

¨

Pre-Effective Amendment No.

¨

Post-Effective Amendment No.

 84

ý

and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT

¨

OF 1940

Amendment No.

85

ý

(Check appropriate box or boxes.)

Mutual Fund Series Trust - File Nos. 333-132541 and 811-21872

(Exact Name of Registrant as Specified in Charter)

4020 South 147th Street, Suite 2, Omaha, Nebraska 68137

(Address of Principal Executive Offices)                (Zip Code)

Registrant’s Telephone Number, including Area Code:   (402) 895-1600

CT CORPORATION SYSTEM

1300 EAST NINTH STREET

CLEVELAND, OH 44114

(Name and Address of Agent for Service)

With copy to:

JoAnn M. Strasser, Thompson Hine LLP

41 South High Street, Suite 1700, Columbus, Ohio 44114-1291

Approximate Date of Proposed Public Offering:  

It is proposed that this filing will become effective:

ýimmediately upon filing pursuant to paragraph (b)

¨  on [date] pursuant to paragraph (b)

¨ 60 days after filing pursuant to paragraph (a)(1)

¨ on (date) pursuant to paragraph (a)(1)

¨ 75 days after filing pursuant to paragraph (a)(2)

¨ on (date) pursuant to paragraph (a)(2) of Rule 485.

If appropriate, check the following box:

¨ this post-effective amendment designates a new effective date for a previously filed post-effective amendment.

SIGNATURES

Pursuant to the requirements of the Securities Act and Investment Company Act, the Registrant certifies that it meets all of the requirement for effectiveness of this registration statement under rule 485(b) under the Securities Act and has duly caused this Post-Effective Amendment to the Registration Statement on Form N-1A to be signed on its behalf by the undersigned, duly authorized in the City of Columbus, State of Ohio, on the 2 8 6 th day of June, 2012.

Mutual Fund Series Trust

By:

/s/ JoAnn M. Strasser

JoAnn M. Strasser

Attorney-in-Fact

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following person in the capacities indicated on the 2 8 6 th day of June, 2012 or as otherwise indicated.

Dr. Bert Pariser*, Trustee

Tobias Caldwell*, Trustee

Jerry Szilagyi, Trustee/President/Principal Executive Officer*  

Erik  Naviloff, Treasurer/Principal Financial Officer *

Tiberiu Weisz*, Trustee

*By:

/s/ JoAnn M. Strasser

JoAnn M. Strasser

Attorney-in-Fact

Exhibit Index

Index No.

Description of Exhibit

EX-101.INS

XBRL Instance Document

EX-101.SCH

XBRL Taxonomy Extension Schema Document

EX-101.CAL

XBRL

Taxonomy Extension Calculation Linkbase

EX-101.DEF

XBRL Taxonomy Extension Definition Linkbase

EX-101.LAB

XBRL Taxonomy Extension Labels Linkbase

EX-101.PRE

XBRL Taxonomy Extension Presentation Linkbase

XML

Catalyst/CP Core Equity Fund

FUND SUMMARY: catalyst/CP CORE EQUITY fund

Investment Objective:

The Fund's goal is to achieve long-term capital appreciation

Fees and Expenses of the Fund:

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts on purchases of Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund.  More information about these and other discounts is available from your financial professional and in How to Buy Shares on page 21 of the Fund's Prospectus.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Catalyst/CP Core Equity Fund (USD $)	Class A	Class C
Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)	5.75%	none
Maximum Deferred Sales Charge (Load) (as a % of the original purchase price)	1.00%	1.00%
Maximum Sales Charge (Load) Imposed on Reinvested Dividends and other Distributions	none	none
Redemption Fee	none	none

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Catalyst/CP Core Equity Fund		Class A	Class C
Management Fees		1.00%	1.00%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%
Other Expenses	[1]	0.40%	0.40%
Total Annual Fund Operating Expenses After Fee Waiver and Reimbursement		1.35%	2.10%
Fee Waiver and Reimbursement	[2]	(0.30%)	(0.30%)
Total Annual Fund Operating Expenses		1.65%	2.40%

Example:

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Catalyst/CP Core Equity Fund (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years
Class A	705	1,038
Class C	213	720

Portfolio Turnover:

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio).  A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund's performance.

Principal investment Strategies:

The Fund seeks to achieve its investment objective by investing primarily in common stocks of U.S. companies.  In addition to common stocks, other types of equity securities in which the Fund may invest include real estate investment trusts (“REITs”) and American Depositary Receipts (“ADRs”).  Under normal conditions, the Fund will invest at least 80% of the Fund’s net assets plus any borrowings for investment purposes in equity securities defined as common stocks, REITs and ADRs. The Fund is managed using an approach that imposes no limits or restrictions on the market capitalization of its investments.  The Fund’s investment strategy focuses on individual stock selection taking into consideration the stock’s industry group.  Using quantitative measures established by the Sub-Advisor, the Fund seeks to purchase equities which have stronger relative performance than other equities.

The Fund believes that the whole market approach provides one main advantage: it allows a shareholder to participate in all major areas of the U.S. equity market in a single fund, including companies of all sizes with both growth and value characteristics.  In so doing, the Fund uses a proprietary, disciplined and quantitative process so that more stocks can be analyzed on a weekly basis more objectively than by following a more traditional, labor intensive investment process.  The Sub-Advisor uses this process to continually analyze equity securities across various industries as candidates for purchase by the Fund.  From the universe of stocks, the Sub-Advisor employs a proprietary analysis based on stock and industry strength, volatility and other factors to select particular stocks to buy, sell or hold.

The Fund is classified as “non-diversified” for purposes of the Investment Company Act of 1940 (the “1940 Act”), which means that it is not limited by the 1940 Act with regard to the portion of its assets that may be invested in the securities of a single issuer.

Principal Risks of Investing in the Fund:

As with any mutual fund, there is no guarantee that the Fund will achieve its goal. The Fund's net asset value and returns will vary and you could lose money on your investment in the Fund.

Foreign Securities Risk.Since the Fund’s investments may include ADRs and foreign securities, the Fund is subject to risks beyond those associated with investing in domestic securities. Foreign companies are generally not subject to the same regulatory requirements of U.S. companies thereby resulting in less publicly available information about these companies.  In addition, foreign accounting, auditing and financial reporting standards generally differ from those applicable to U.S. companies.

Limited History of Operations. The Fund is a new or relatively new mutual fund and has a limited history of operations.

Management Risk.  The portfolio manager’s judgments about the attractiveness, value and potential appreciation of particular stocks or other securities in which the Fund invests may prove to be incorrect and there is no guarantee that the portfolio manager’s judgment will produce the desired results. 

Market Risk.  Overall stock market risks may also affect the value of the Fund.  Factors such as domestic economic growth and market conditions, interest rate levels and political events affect the securities markets.

Medium (Mid) Capitalization Stock Risk.   The earnings and prospects of mid-capitalization companies are more volatile than larger companies, they may experience higher failure rates than larger companies and normally have a lower trading volume than larger companies, which may tend to make their market price fall more disproportionately than larger companies in response to selling pressures.

Non-diversification Risk. Because a relatively high percentage of a non-diversified Fund’s assets may be invested in the securities of a limited number of companies that could be in the same or related economic sectors, the Fund’s portfolio may be more susceptible to any single economic, technological or regulatory occurrence than the portfolio of a diversified fund.

Real Estate Risk.  The Fund is subject to the risks of the real estate market as a whole, such as taxation, regulations and economic and political factors that negatively impact the real estate market and the direct ownership of real estate.  These may include decreases in real estate values, overbuilding, rising operating costs, interest rates and property taxes. In addition, some real estate related investments are not fully diversified and are subject to the risks associated with financing a limited number of projects.  REITs are heavily dependent upon the management team and are subject to heavy cash flow dependency, defaults by borrowers and self-liquidation.

Security Risk.  The value of the Fund may decrease in response to the activities and financial prospects of an individual security in the Fund’s portfolio.

Smaller Capitalization Stock Risk.  To the extent the Fund invests in the stocks of smaller-sized companies, the Fund may be subject to additional risks, including the risk that earnings and prospects of these companies are more volatile than larger companies. 

Performance:

Because the Fund is a new fund and does not yet have a full calendar of investment operations, no performance information is presented for the Fund at this time.  In the future, performance information will be presented in this section of this Prospectus.   Updated performance information will be available at no cost by calling 1-866-447-4228.

Catalyst/CP World Equity Fund

FUND SUMMARY: catalyst/CP WORLD EQUITY fund

Investment Objective:

The Fund's goal is to achieve long-term capital appreciation.

Fees and Expenses of the Fund:

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts on purchases of Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund.  More information about these and other discounts is available from your financial professional and in How to Buy Shares on page 21 of the Fund's Prospectus.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Catalyst/CP World Equity Fund (USD $)	Class A	Class C
Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)	5.75%	none
Maximum Deferred Sales Charge (Load) (as a % of the original purchase price)	1.00%	1.00%
Maximum Sales Charge (Load) Imposed on Reinvested Dividends and other Distributions	none	none
Redemption Fee	none	none

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Catalyst/CP World Equity Fund		Class A	Class C
Management Fees		1.00%	1.00%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%
Other Expenses	[1]	0.40%	0.40%
Acquired Fund Fees and Expenses	[1][2]	0.40%	0.40%
Total Annual Fund Operating Expenses After Fee Waiver and Reimbursement		1.75%	2.50%
Fee Waiver and Reimbursement	[3]	(0.30%)	(0.30%)
Total Annual Fund Operating Expenses		2.05%	2.80%

Example:

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Catalyst/CP World Equity Fund (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years
Class A	743	1,153
Class C	253	840

Portfolio Turnover:

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio).  A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund's performance.

Principal investment Strategies:

The Fund seeks to achieve its investment objectives by allocating its portfolio among various broad or narrow equity indexes through the use of exchange traded funds (“ETFs”) or other index-oriented investments. The Fund typically selects ETFs that invest across a broad range of global asset classes including, but not limited to, U.S., emerging market and other international stocks and real estate securities. Under normal conditions, the Fund will invest at least 80% of the Fund’s net assets plus any borrowings for investment purposes in ETFs that invest substantially all of their assets in common stocks, REITs or ADRs, and at least 40% of the Fund’s net assets in securities from at least three foreign countries, including emerging markets countries. Equity securities held by ETFs in which the Fund invests may include any market capitalization, style, class or sector and may be focused on a specific industry or country. While the Fund may focus its investments in a particular industry from time to time, it will not invest more than 25% of its net assets plus borrowings for investment purposes in any particular industry.  With respect to investments in foreign countries, the Fund will consider an ETF to be a foreign security if at least 40% of the ETF’s net assets are foreign investments.

The Fund uses a proprietary, disciplined and quantitative process to analyze stocks, industries and global regions in which ETFs invest.  The Sub-Advisor uses this process to continually analyze various industries and indexes as candidates for purchase by the Fund.  From the universe of indexes, the Sub-Advisor employs a proprietary analysis based on relative strength, volatility and other factors to select particular indexes to buy, sell or hold for the Fund.

The Fund is classified as “non-diversified” for purposes of the Investment Company Act of 1940 (the “1940 Act”), which means that it is not limited by the 1940 Act with regard to the portion of its assets that may be invested in the securities of a single issuer.

Principal Risks of Investing in the Fund:

As with any mutual fund, there is no guarantee that the Fund will achieve its goal. The Fund's net asset value and returns will vary and you could lose money on your investment in the Fund.

Acquired Fund Risk. Because the Fund invests in other investment companies such as ETFs, the value of your investment will fluctuate in response to the performance of the acquired funds. Investing in acquired funds involves certain additional expenses and certain tax results that would not arise if you invested directly in the securities of the acquired funds.

Currency Risk.  The Fund’s net asset value could decline as a result of changes in the exchange rates between foreign currencies and the U.S. dollar. Additionally, certain foreign countries may impose restrictions on the ability of issuers of foreign securities to make payment of principal and interest to investors located outside the country, due to blockage of foreign currency exchanges or otherwise.

Emerging Market Risk. Investing in emerging markets involves not only the risks with respect to investing in foreign securities, but also other risks, including exposure to economic structures that are generally less diverse and mature, and to political systems that can be expected to have less stability, than those of developed countries.  The typically small size of the markets of securities of issuers located in emerging markets and the possibility of a low or nonexistent volume of trading in those securities may also result in a lack of liquidity and in price volatility of those securities.

Foreign Securities Risk.Since the Fund’s investments may include ADRs and foreign securities, the Fund is subject to risks beyond those associated with investing in domestic securities. Foreign companies are generally not subject to the same regulatory requirements of U.S. companies thereby resulting in less publicly available information about these companies.  In addition, foreign accounting, auditing and financial reporting standards generally differ from those applicable to U.S. companies.

Limited History of Operations. The Fund is a new or relatively new mutual fund and has a limited history of operations.

Management Risk.  The portfolio manager’s judgments about the attractiveness, value and potential appreciation of particular stocks or other securities in which the Fund invests may prove to be incorrect and there is no guarantee that the portfolio manager’s judgment will produce the desired results. 

Market Risk.  Overall stock market risks may also affect the value of the Fund.  Factors such as domestic economic growth and market conditions, interest rate levels and political events affect the securities markets.

Medium (Mid) Capitalization Stock Risk.   The earnings and prospects of mid-capitalization companies are more volatile than larger companies, they may experience higher failure rates than larger companies and normally have a lower trading volume than larger companies, which may tend to make their market price fall more disproportionately than larger companies in response to selling pressures.

Non-diversification Risk. Because a relatively high percentage of a non-diversified Fund’s assets may be invested in the securities of a limited number of companies that could be in the same or related economic sectors, the Fund’s portfolio may be more susceptible to any single economic, technological or regulatory occurrence than the portfolio of a diversified fund.

Real Estate Risk.  The Fund is subject to the risks of the real estate market as a whole, such as taxation, regulations and economic and political factors that negatively impact the real estate market.  These may include decreases in real estate values, overbuilding, increases in operating costs, interest rates and property taxes. In addition, some real estate related investments are not fully diversified and are subject to the risks associated with financing a limited number of projects.

Sector and Industry Risk.  The Fund may be subject to the risk that its assets are invested in a particular sector or industry in the economy and as a result, the value of the Fund may be adversely impacted by events or developments in a sector or industry.  These events or developments might include additional government regulation, resource shortages or surpluses, changes in consumer demands or improvements in technology that make products or services of a particular sector or industry less desirable.

Security Risk.  The value of the Fund may decrease in response to the activities and financial prospects of an individual security in the Fund’s portfolio.

Smaller Capitalization Stock Risk.  To the extent the Fund invests in the stocks of smaller-sized companies, the Fund may be subject to additional risks, including the risk that earnings and prospects of these companies are more volatile than larger companies.

Performance:

Because the Fund is a new fund and does not yet have a full calendar of investment operations, no performance information is presented for the Fund at this time.  In the future, performance information will be presented in this section of this Prospectus.   Updated performance information will be available at no cost by calling 1-866-447-4228.

Catalyst/CP Focus Large Cap Fund

FUND SUMMARY: catalyst/CP focus LARGE CAP fund

Investment Objective:

The Fund's goal is to achieve long-term capital appreciation.

Fees and Expenses of the Fund:

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts on purchases of Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund.  More information about these and other discounts is available from your financial professional and in How to Buy Shares on page 21 of the Fund's Prospectus.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Catalyst/CP Focus Large Cap Fund (USD $)	Class A	Class C
Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)	5.75%	none
Maximum Deferred Sales Charge (Load) (as a % of the original purchase price)	1.00%	1.00%
Maximum Sales Charge (Load) Imposed on Reinvested Dividends and other Distributions	none	none
Redemption Fee	none	none

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Catalyst/CP Focus Large Cap Fund		Class A	Class C
Management Fees		1.00%	1.00%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%
Other Expenses	[1]	0.40%	0.40%
Total Annual Fund Operating Expenses After Fee Waiver and Reimbursement		1.35%	2.10%
Fee Waiver and Reimbursement	[2]	(0.30%)	(0.30%)
Total Annual Fund Operating Expenses		1.65%	2.40%

Example:

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Catalyst/CP Focus Large Cap Fund (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years
Class A	705	1,030
Class C	213	720

Portfolio Turnover:

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio).  A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund's performance.

Principal Investment Strategies:

The Fund invests primarily in common stocks of domestic issuers. Under normal conditions, the Fund will invest at least 80% of the Fund’s net assets plus any borrowings for investment purposes in large cap stocks defined as stocks of companies with at least $8 billion in market capitalization.

In actively managing the portfolio, the investment team emphasizes sectors and industries that are expected to exhibit strong growth potential, choosing to overweight these areas of the index while underweighting less appealing sectors and industries.  Typically, the portfolio will include about 25 securities.

The Fund uses a proprietary, disciplined and quantitative process so that more stocks can be analyzed on a weekly basis more objectively than by following a more traditional, labor intensive investment process.  The Sub-Advisor uses this process to continually analyze equity securities across various industries as candidates for purchase by the Fund.  From the universe of stocks, the Sub-Advisor employs a proprietary analysis based on stock and industry strength, volatility and other factors to select particular stocks to buy, sell or hold for the Fund.

The Fund is classified as “non-diversified” for purposes of the Investment Company Act of 1940 (the “1940 Act”), which means that it is not limited by the 1940 Act with regard to the portion of its assets that may be invested in the securities of a single issuer.

Principal Risks of Investing in the Fund:

As with any mutual fund, there is no guarantee that the Fund will achieve its goal. The Fund's net asset value and returns will vary and you could lose money on your investment in the Fund.

Limited History of Operations. The Fund is a new or relatively new mutual fund and has a limited history of operations.

Management Risk.  The portfolio manager’s judgments about the attractiveness, value and potential appreciation of particular stocks or other securities in which the Fund invests may prove to be incorrect and there is no guarantee that the portfolio manager’s judgment will produce the desired results. 

Market Risk.  Overall stock market risks may also affect the value of the Fund.  Factors such as domestic economic growth and market conditions, interest rate levels and political events affect the securities markets.

Non-diversification Risk. Because a relatively high percentage of a non-diversified Fund’s assets may be invested in the securities of a limited number of companies that could be in the same or related economic sectors, the Fund’s portfolio may be more susceptible to any single economic, technological or regulatory occurrence than the portfolio of a diversified fund.

Security Risk.  The value of the Fund may decrease in response to the activities and financial prospects of an individual security in the Fund’s portfolio.

Performance:

Because the Fund is a new fund and does not yet have a full calendar of investment operations, no performance information is presented for the Fund at this time.  In the future, performance information will be presented in this section of this Prospectus.   Updated performance information will be available at no cost by calling 1-866-447-4228.

Catalyst/CP Focus Mid Cap Fund

FUND SUMMARY: catalyst/CP focus mid CAP fund

Investment Objective:

The Fund's goal is to achieve long-term capital appreciation.

Fees and Expenses of the Fund:

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts on purchases of Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund.  More information about these and other discounts is available from your financial professional and in How to Buy Shares on page 21 of the Fund's Prospectus.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Catalyst/CP Focus Mid Cap Fund (USD $)	Class A	Class C
Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)	5.75%	none
Maximum Deferred Sales Charge (Load) (as a % of the original purchase price)	1.00%	1.00%
Maximum Sales Charge (Load) Imposed on Reinvested Dividends and other Distributions	none	none
Redemption Fee	none	none

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Catalyst/CP Focus Mid Cap Fund		Class A	Class C
Management Fees		1.00%	1.00%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%
Other Expenses	[1]	0.40%	0.40%
Total Annual Fund Operating Expenses After Fee Waiver and Reimbursement		1.50%	2.25%
Fee Waiver and Reimbursement	[2]	(0.15%)	(0.15%)
Total Annual Fund Operating Expenses		1.65%	2.40%

Example:

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Catalyst/CP Focus Mid Cap Fund (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years
Class A	719	1,149
Class C	228	734

Portfolio Turnover:

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio).  A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund's performance.

Principal Investment Strategies:

The Fund invests primarily in common stocks of domestic issuers. Under normal conditions, the Fund will invest at least 80% of the Fund’s net assets plus any borrowings for investment purposes in mid cap stocks defined as stocks of companies with market capitalizations of $3 billion to $10 billion.

Selection preference of stocks is given to the fifty largest names in the S&P MidCap 400 Index, but the investment management team may select any security, regardless of index inclusion or exclusion, with a market capitalization that falls within the current range of the S&P MidCap 400 Index.  In actively managing the portfolio, the investment team emphasizes sectors and industries that are expected to exhibit strong growth potential, choosing to overweight these areas of the index while underweighting less appealing sectors and industries.  Typically, the portfolio will include about 25 securities.

The Fund uses a proprietary, disciplined and quantitative process so that more stocks can be analyzed on a weekly basis more objectively than by following a more traditional, labor intensive investment process.  The Sub-Advisor uses this process to continually analyze equity securities across various industries as candidates for purchase by the Fund.  From the universe of stocks, the Sub-Advisor employs a proprietary analysis based on stock and industry strength, volatility and other factors to select particular stocks to buy, sell or hold for the Fund.

The Fund is classified as “non-diversified” for purposes of the Investment Company Act of 1940 (the “1940 Act”), which means that it is not limited by the 1940 Act with regard to the portion of its assets that may be invested in the securities of a single issuer.

Principal Risks of Investing in the Fund:

As with any mutual fund, there is no guarantee that the Fund will achieve its goal. The Fund's net asset value and returns will vary and you could lose money on your investment in the Fund.

Limited History of Operations. The Fund is a new or relatively new mutual fund and has a limited history of operations.

Management Risk.  The portfolio manager’s judgments about the attractiveness, value and potential appreciation of particular stocks or other securities in which the Fund invests may prove to be incorrect and there is no guarantee that the portfolio manager’s judgment will produce the desired results. 

Market Risk.  Overall stock market risks may also affect the value of the Fund.  Factors such as domestic economic growth and market conditions, interest rate levels and political events affect the securities markets.

Medium (Mid) Capitalization Stock Risk.   The earnings and prospects of mid-capitalization companies are more volatile than larger companies. They may experience higher failure rates than larger companies and normally have a lower trading volume than larger companies, which may tend to make their market price fall more disproportionately than larger companies in response to selling pressures.

Non-diversification Risk. Because a relatively high percentage of a non-diversified Fund’s assets may be invested in the securities of a limited number of companies that could be in the same or related economic sectors, the Fund’s portfolio may be more susceptible to any single economic, technological or regulatory occurrence than the portfolio of a diversified fund.

Security Risk.  The value of the Fund may decrease in response to the activities and financial prospects of an individual security in the Fund’s portfolio.

Performance:

Because the Fund is a new fund and does not yet have a full calendar of investment operations, no performance information is presented for the Fund at this time.  In the future, performance information will be presented in this section of this Prospectus.   Updated performance information will be available at no cost by calling 1-866-447-4228.

[1] Estimated for the current fiscal year.

[2] The advisor has contractually agreed to waive fees and/or reimburse expenses of the Fund through December 31, 2012. This agreement may be terminated by the Fund's Board of Trustees on 60 days' written notice to the advisor.

[1] Estimated for the current fiscal year.

[2] Acquired Fund Fees and Expenses are the indirect costs of investing in other investment companies. The operating expenses in this fee table will not correlate to the expense ratio in the Fund's financial highlights because the financial statements include only the direct operating expenses incurred by the Fund, not the indirect costs of investing in other investment companies.

[3] The advisor has contractually agreed to waive fees and/or reimburse expenses of the Fund through December 31, 2012. This agreement may be terminated by the Fund's Board of Trustees on 60 days' written notice to the advisor.

[1] Estimated for the current fiscal year.

[2] The advisor has contractually agreed to waive fees and/or reimburse expenses of the Fund through December 31, 2012. This agreement may be terminated by the Fund's Board of Trustees on 60 days' written notice to the advisor.

[1] Estimated for the current fiscal year.

[2] The advisor has contractually agreed to waive fees and/or reimburse expenses of the Fund through December 31, 2012. This agreement may be terminated by the Fund's Board of Trustees on 60 days' written notice to the advisor.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Document Type

dei_DocumentType

485BPOS

Document Period End Date

dei_DocumentPeriodEndDate

Dec. 21, 2011

Registrant Name

dei_EntityRegistrantName

Mutual Fund Series Trust

Central Index Key

dei_EntityCentralIndexKey

0001355064

Amendment Flag

dei_AmendmentFlag

false

Prospectus Date

rr_ProspectusDate

Dec. 21, 2011

Catalyst/CP Core Equity Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

FUND SUMMARY: catalyst/CP CORE EQUITY fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective:

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund's goal is to achieve long-term capital appreciation

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund:

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts on purchases of Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund.  More information about these and other discounts is available from your financial professional and in How to Buy Shares on page 21 of the Fund's Prospectus.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover:

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio).  A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund's performance.

Expense Example [Heading]

rr_ExpenseExampleHeading

Example:

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal investment Strategies:

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund seeks to achieve its investment objective by investing primarily in common stocks of U.S. companies.  In addition to common stocks, other types of equity securities in which the Fund may invest include real estate investment trusts (“REITs”) and American Depositary Receipts (“ADRs”).  Under normal conditions, the Fund will invest at least 80% of the Fund’s net assets plus any borrowings for investment purposes in equity securities defined as common stocks, REITs and ADRs. The Fund is managed using an approach that imposes no limits or restrictions on the market capitalization of its investments.  The Fund’s investment strategy focuses on individual stock selection taking into consideration the stock’s industry group.  Using quantitative measures established by the Sub-Advisor, the Fund seeks to purchase equities which have stronger relative performance than other equities.

The Fund believes that the whole market approach provides one main advantage: it allows a shareholder to participate in all major areas of the U.S. equity market in a single fund, including companies of all sizes with both growth and value characteristics.  In so doing, the Fund uses a proprietary, disciplined and quantitative process so that more stocks can be analyzed on a weekly basis more objectively than by following a more traditional, labor intensive investment process.  The Sub-Advisor uses this process to continually analyze equity securities across various industries as candidates for purchase by the Fund.  From the universe of stocks, the Sub-Advisor employs a proprietary analysis based on stock and industry strength, volatility and other factors to select particular stocks to buy, sell or hold.

The Fund is classified as “non-diversified” for purposes of the Investment Company Act of 1940 (the “1940 Act”), which means that it is not limited by the 1940 Act with regard to the portion of its assets that may be invested in the securities of a single issuer.

Risk [Heading]

rr_RiskHeading

Principal Risks of Investing in the Fund:

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the Fund will achieve its goal. The Fund's net asset value and returns will vary and you could lose money on your investment in the Fund.

Foreign Securities Risk.Since the Fund’s investments may include ADRs and foreign securities, the Fund is subject to risks beyond those associated with investing in domestic securities. Foreign companies are generally not subject to the same regulatory requirements of U.S. companies thereby resulting in less publicly available information about these companies.  In addition, foreign accounting, auditing and financial reporting standards generally differ from those applicable to U.S. companies.

Limited History of Operations. The Fund is a new or relatively new mutual fund and has a limited history of operations.

Management Risk.  The portfolio manager’s judgments about the attractiveness, value and potential appreciation of particular stocks or other securities in which the Fund invests may prove to be incorrect and there is no guarantee that the portfolio manager’s judgment will produce the desired results. 

Market Risk.  Overall stock market risks may also affect the value of the Fund.  Factors such as domestic economic growth and market conditions, interest rate levels and political events affect the securities markets.

Medium (Mid) Capitalization Stock Risk.   The earnings and prospects of mid-capitalization companies are more volatile than larger companies, they may experience higher failure rates than larger companies and normally have a lower trading volume than larger companies, which may tend to make their market price fall more disproportionately than larger companies in response to selling pressures.

Non-diversification Risk. Because a relatively high percentage of a non-diversified Fund’s assets may be invested in the securities of a limited number of companies that could be in the same or related economic sectors, the Fund’s portfolio may be more susceptible to any single economic, technological or regulatory occurrence than the portfolio of a diversified fund.

Real Estate Risk.  The Fund is subject to the risks of the real estate market as a whole, such as taxation, regulations and economic and political factors that negatively impact the real estate market and the direct ownership of real estate.  These may include decreases in real estate values, overbuilding, rising operating costs, interest rates and property taxes. In addition, some real estate related investments are not fully diversified and are subject to the risks associated with financing a limited number of projects.  REITs are heavily dependent upon the management team and are subject to heavy cash flow dependency, defaults by borrowers and self-liquidation.

Security Risk.  The value of the Fund may decrease in response to the activities and financial prospects of an individual security in the Fund’s portfolio.

Smaller Capitalization Stock Risk.  To the extent the Fund invests in the stocks of smaller-sized companies, the Fund may be subject to additional risks, including the risk that earnings and prospects of these companies are more volatile than larger companies. 

Risk Lose Money [Text]

rr_RiskLoseMoney

The Fund's net asset value and returns will vary and you could lose money on your investment in the Fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance:

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

Because the Fund is a new fund and does not yet have a full calendar of investment operations, no performance information is presented for the Fund at this time.  In the future, performance information will be presented in this section of this Prospectus.   Updated performance information will be available at no cost by calling 1-866-447-4228.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-866-447-4228

Catalyst/CP Core Equity Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum Deferred Sales Charge (Load) (as a % of the original purchase price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Maximum Sales Charge (Load) Imposed on Reinvested Dividends and other Distributions

rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther

none

Redemption Fee

rr_RedemptionFee

none

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.40%

^[1]

Total Annual Fund Operating Expenses After Fee Waiver and Reimbursement

rr_ExpensesOverAssets

1.35%

Fee Waiver and Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.30%)

^[3]

Total Annual Fund Operating Expenses

rr_NetExpensesOverAssets

1.65%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

705

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,038

Catalyst/CP Core Equity Fund | Class C

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the original purchase price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Maximum Sales Charge (Load) Imposed on Reinvested Dividends and other Distributions

rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther

none

Redemption Fee

rr_RedemptionFee

none

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

0.40%

^[1]

Total Annual Fund Operating Expenses After Fee Waiver and Reimbursement

rr_ExpensesOverAssets

2.10%

Fee Waiver and Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.30%)

^[3]

Total Annual Fund Operating Expenses

rr_NetExpensesOverAssets

2.40%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

213

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

720

Catalyst/CP World Equity Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

FUND SUMMARY: catalyst/CP WORLD EQUITY fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective:

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund's goal is to achieve long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund:

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts on purchases of Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund.  More information about these and other discounts is available from your financial professional and in How to Buy Shares on page 21 of the Fund's Prospectus.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover:

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio).  A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund's performance.

Expense Example [Heading]

rr_ExpenseExampleHeading

Example:

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal investment Strategies:

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund seeks to achieve its investment objectives by allocating its portfolio among various broad or narrow equity indexes through the use of exchange traded funds (“ETFs”) or other index-oriented investments. The Fund typically selects ETFs that invest across a broad range of global asset classes including, but not limited to, U.S., emerging market and other international stocks and real estate securities. Under normal conditions, the Fund will invest at least 80% of the Fund’s net assets plus any borrowings for investment purposes in ETFs that invest substantially all of their assets in common stocks, REITs or ADRs, and at least 40% of the Fund’s net assets in securities from at least three foreign countries, including emerging markets countries. Equity securities held by ETFs in which the Fund invests may include any market capitalization, style, class or sector and may be focused on a specific industry or country. While the Fund may focus its investments in a particular industry from time to time, it will not invest more than 25% of its net assets plus borrowings for investment purposes in any particular industry.  With respect to investments in foreign countries, the Fund will consider an ETF to be a foreign security if at least 40% of the ETF’s net assets are foreign investments.

The Fund uses a proprietary, disciplined and quantitative process to analyze stocks, industries and global regions in which ETFs invest.  The Sub-Advisor uses this process to continually analyze various industries and indexes as candidates for purchase by the Fund.  From the universe of indexes, the Sub-Advisor employs a proprietary analysis based on relative strength, volatility and other factors to select particular indexes to buy, sell or hold for the Fund.

The Fund is classified as “non-diversified” for purposes of the Investment Company Act of 1940 (the “1940 Act”), which means that it is not limited by the 1940 Act with regard to the portion of its assets that may be invested in the securities of a single issuer.

Risk [Heading]

rr_RiskHeading

Principal Risks of Investing in the Fund:

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the Fund will achieve its goal. The Fund's net asset value and returns will vary and you could lose money on your investment in the Fund.

Acquired Fund Risk. Because the Fund invests in other investment companies such as ETFs, the value of your investment will fluctuate in response to the performance of the acquired funds. Investing in acquired funds involves certain additional expenses and certain tax results that would not arise if you invested directly in the securities of the acquired funds.

Currency Risk.  The Fund’s net asset value could decline as a result of changes in the exchange rates between foreign currencies and the U.S. dollar. Additionally, certain foreign countries may impose restrictions on the ability of issuers of foreign securities to make payment of principal and interest to investors located outside the country, due to blockage of foreign currency exchanges or otherwise.

Emerging Market Risk. Investing in emerging markets involves not only the risks with respect to investing in foreign securities, but also other risks, including exposure to economic structures that are generally less diverse and mature, and to political systems that can be expected to have less stability, than those of developed countries.  The typically small size of the markets of securities of issuers located in emerging markets and the possibility of a low or nonexistent volume of trading in those securities may also result in a lack of liquidity and in price volatility of those securities.

Foreign Securities Risk.Since the Fund’s investments may include ADRs and foreign securities, the Fund is subject to risks beyond those associated with investing in domestic securities. Foreign companies are generally not subject to the same regulatory requirements of U.S. companies thereby resulting in less publicly available information about these companies.  In addition, foreign accounting, auditing and financial reporting standards generally differ from those applicable to U.S. companies.

Limited History of Operations. The Fund is a new or relatively new mutual fund and has a limited history of operations.

Management Risk.  The portfolio manager’s judgments about the attractiveness, value and potential appreciation of particular stocks or other securities in which the Fund invests may prove to be incorrect and there is no guarantee that the portfolio manager’s judgment will produce the desired results. 

Market Risk.  Overall stock market risks may also affect the value of the Fund.  Factors such as domestic economic growth and market conditions, interest rate levels and political events affect the securities markets.

Medium (Mid) Capitalization Stock Risk.   The earnings and prospects of mid-capitalization companies are more volatile than larger companies, they may experience higher failure rates than larger companies and normally have a lower trading volume than larger companies, which may tend to make their market price fall more disproportionately than larger companies in response to selling pressures.

Non-diversification Risk. Because a relatively high percentage of a non-diversified Fund’s assets may be invested in the securities of a limited number of companies that could be in the same or related economic sectors, the Fund’s portfolio may be more susceptible to any single economic, technological or regulatory occurrence than the portfolio of a diversified fund.

Real Estate Risk.  The Fund is subject to the risks of the real estate market as a whole, such as taxation, regulations and economic and political factors that negatively impact the real estate market.  These may include decreases in real estate values, overbuilding, increases in operating costs, interest rates and property taxes. In addition, some real estate related investments are not fully diversified and are subject to the risks associated with financing a limited number of projects.

Sector and Industry Risk.  The Fund may be subject to the risk that its assets are invested in a particular sector or industry in the economy and as a result, the value of the Fund may be adversely impacted by events or developments in a sector or industry.  These events or developments might include additional government regulation, resource shortages or surpluses, changes in consumer demands or improvements in technology that make products or services of a particular sector or industry less desirable.

Security Risk.  The value of the Fund may decrease in response to the activities and financial prospects of an individual security in the Fund’s portfolio.

Smaller Capitalization Stock Risk.  To the extent the Fund invests in the stocks of smaller-sized companies, the Fund may be subject to additional risks, including the risk that earnings and prospects of these companies are more volatile than larger companies.

Risk Lose Money [Text]

rr_RiskLoseMoney

The Fund's net asset value and returns will vary and you could lose money on your investment in the Fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance:

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

Because the Fund is a new fund and does not yet have a full calendar of investment operations, no performance information is presented for the Fund at this time.  In the future, performance information will be presented in this section of this Prospectus.   Updated performance information will be available at no cost by calling 1-866-447-4228.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

866-447-4228.

Catalyst/CP World Equity Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum Deferred Sales Charge (Load) (as a % of the original purchase price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Maximum Sales Charge (Load) Imposed on Reinvested Dividends and other Distributions

rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther

none

Redemption Fee

rr_RedemptionFee

none

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.40%

^[1]

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.40%

^[1],[2]

Total Annual Fund Operating Expenses After Fee Waiver and Reimbursement

rr_ExpensesOverAssets

1.75%

Fee Waiver and Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.30%)

^[3]

Total Annual Fund Operating Expenses

rr_NetExpensesOverAssets

2.05%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

743

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,153

Catalyst/CP World Equity Fund | Class C

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the original purchase price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Maximum Sales Charge (Load) Imposed on Reinvested Dividends and other Distributions

rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther

none

Redemption Fee

rr_RedemptionFee

none

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

0.40%

^[1]

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.40%

^[1],[2]

Total Annual Fund Operating Expenses After Fee Waiver and Reimbursement

rr_ExpensesOverAssets

2.50%

Fee Waiver and Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.30%)

^[3]

Total Annual Fund Operating Expenses

rr_NetExpensesOverAssets

2.80%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

253

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

840

Catalyst/CP Focus Large Cap Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

FUND SUMMARY: catalyst/CP focus LARGE CAP fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective:

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund's goal is to achieve long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund:

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts on purchases of Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund.  More information about these and other discounts is available from your financial professional and in How to Buy Shares on page 21 of the Fund's Prospectus.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover:

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio).  A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund's performance.

Expense Example [Heading]

rr_ExpenseExampleHeading

Example:

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies:

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund invests primarily in common stocks of domestic issuers. Under normal conditions, the Fund will invest at least 80% of the Fund’s net assets plus any borrowings for investment purposes in large cap stocks defined as stocks of companies with at least $8 billion in market capitalization.

In actively managing the portfolio, the investment team emphasizes sectors and industries that are expected to exhibit strong growth potential, choosing to overweight these areas of the index while underweighting less appealing sectors and industries.  Typically, the portfolio will include about 25 securities.

The Fund uses a proprietary, disciplined and quantitative process so that more stocks can be analyzed on a weekly basis more objectively than by following a more traditional, labor intensive investment process.  The Sub-Advisor uses this process to continually analyze equity securities across various industries as candidates for purchase by the Fund.  From the universe of stocks, the Sub-Advisor employs a proprietary analysis based on stock and industry strength, volatility and other factors to select particular stocks to buy, sell or hold for the Fund.

The Fund is classified as “non-diversified” for purposes of the Investment Company Act of 1940 (the “1940 Act”), which means that it is not limited by the 1940 Act with regard to the portion of its assets that may be invested in the securities of a single issuer.

Risk [Heading]

rr_RiskHeading

Principal Risks of Investing in the Fund:

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the Fund will achieve its goal. The Fund's net asset value and returns will vary and you could lose money on your investment in the Fund.

Limited History of Operations. The Fund is a new or relatively new mutual fund and has a limited history of operations.

Management Risk.  The portfolio manager’s judgments about the attractiveness, value and potential appreciation of particular stocks or other securities in which the Fund invests may prove to be incorrect and there is no guarantee that the portfolio manager’s judgment will produce the desired results. 

Market Risk.  Overall stock market risks may also affect the value of the Fund.  Factors such as domestic economic growth and market conditions, interest rate levels and political events affect the securities markets.

Non-diversification Risk. Because a relatively high percentage of a non-diversified Fund’s assets may be invested in the securities of a limited number of companies that could be in the same or related economic sectors, the Fund’s portfolio may be more susceptible to any single economic, technological or regulatory occurrence than the portfolio of a diversified fund.

Security Risk.  The value of the Fund may decrease in response to the activities and financial prospects of an individual security in the Fund’s portfolio.

Risk Lose Money [Text]

rr_RiskLoseMoney

The Fund's net asset value and returns will vary and you could lose money on your investment in the Fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance:

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

Because the Fund is a new fund and does not yet have a full calendar of investment operations, no performance information is presented for the Fund at this time.  In the future, performance information will be presented in this section of this Prospectus.   Updated performance information will be available at no cost by calling 1-866-447-4228.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

866-447-4228

Catalyst/CP Focus Large Cap Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum Deferred Sales Charge (Load) (as a % of the original purchase price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Maximum Sales Charge (Load) Imposed on Reinvested Dividends and other Distributions

rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther

none

Redemption Fee

rr_RedemptionFee

none

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.40%

^[1]

Total Annual Fund Operating Expenses After Fee Waiver and Reimbursement

rr_ExpensesOverAssets

1.35%

Fee Waiver and Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.30%)

^[3]

Total Annual Fund Operating Expenses

rr_NetExpensesOverAssets

1.65%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

705

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,030

Catalyst/CP Focus Large Cap Fund | Class C

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the original purchase price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Maximum Sales Charge (Load) Imposed on Reinvested Dividends and other Distributions

rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther

none

Redemption Fee

rr_RedemptionFee

none

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

0.40%

^[1]

Total Annual Fund Operating Expenses After Fee Waiver and Reimbursement

rr_ExpensesOverAssets

2.10%

Fee Waiver and Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.30%)

^[3]

Total Annual Fund Operating Expenses

rr_NetExpensesOverAssets

2.40%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

213

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

720

Catalyst/CP Focus Mid Cap Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

FUND SUMMARY: catalyst/CP focus mid CAP fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective:

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund's goal is to achieve long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund:

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts on purchases of Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund.  More information about these and other discounts is available from your financial professional and in How to Buy Shares on page 21 of the Fund's Prospectus.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover:

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio).  A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund's performance.

Expense Example [Heading]

rr_ExpenseExampleHeading

Example:

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies:

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund invests primarily in common stocks of domestic issuers. Under normal conditions, the Fund will invest at least 80% of the Fund’s net assets plus any borrowings for investment purposes in mid cap stocks defined as stocks of companies with market capitalizations of $3 billion to $10 billion.

Selection preference of stocks is given to the fifty largest names in the S&P MidCap 400 Index, but the investment management team may select any security, regardless of index inclusion or exclusion, with a market capitalization that falls within the current range of the S&P MidCap 400 Index.  In actively managing the portfolio, the investment team emphasizes sectors and industries that are expected to exhibit strong growth potential, choosing to overweight these areas of the index while underweighting less appealing sectors and industries.  Typically, the portfolio will include about 25 securities.

The Fund uses a proprietary, disciplined and quantitative process so that more stocks can be analyzed on a weekly basis more objectively than by following a more traditional, labor intensive investment process.  The Sub-Advisor uses this process to continually analyze equity securities across various industries as candidates for purchase by the Fund.  From the universe of stocks, the Sub-Advisor employs a proprietary analysis based on stock and industry strength, volatility and other factors to select particular stocks to buy, sell or hold for the Fund.

The Fund is classified as “non-diversified” for purposes of the Investment Company Act of 1940 (the “1940 Act”), which means that it is not limited by the 1940 Act with regard to the portion of its assets that may be invested in the securities of a single issuer.

Risk [Heading]

rr_RiskHeading

Principal Risks of Investing in the Fund:

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the Fund will achieve its goal. The Fund's net asset value and returns will vary and you could lose money on your investment in the Fund.

Limited History of Operations. The Fund is a new or relatively new mutual fund and has a limited history of operations.

Management Risk.  The portfolio manager’s judgments about the attractiveness, value and potential appreciation of particular stocks or other securities in which the Fund invests may prove to be incorrect and there is no guarantee that the portfolio manager’s judgment will produce the desired results. 

Market Risk.  Overall stock market risks may also affect the value of the Fund.  Factors such as domestic economic growth and market conditions, interest rate levels and political events affect the securities markets.

Medium (Mid) Capitalization Stock Risk.   The earnings and prospects of mid-capitalization companies are more volatile than larger companies. They may experience higher failure rates than larger companies and normally have a lower trading volume than larger companies, which may tend to make their market price fall more disproportionately than larger companies in response to selling pressures.

Non-diversification Risk. Because a relatively high percentage of a non-diversified Fund’s assets may be invested in the securities of a limited number of companies that could be in the same or related economic sectors, the Fund’s portfolio may be more susceptible to any single economic, technological or regulatory occurrence than the portfolio of a diversified fund.

Security Risk.  The value of the Fund may decrease in response to the activities and financial prospects of an individual security in the Fund’s portfolio.

Risk Lose Money [Text]

rr_RiskLoseMoney

The Fund's net asset value and returns will vary and you could lose money on your investment in the Fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance:

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

Because the Fund is a new fund and does not yet have a full calendar of investment operations, no performance information is presented for the Fund at this time.  In the future, performance information will be presented in this section of this Prospectus.   Updated performance information will be available at no cost by calling 1-866-447-4228.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

866-447-4228

Catalyst/CP Focus Mid Cap Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum Deferred Sales Charge (Load) (as a % of the original purchase price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Maximum Sales Charge (Load) Imposed on Reinvested Dividends and other Distributions

rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther

none

Redemption Fee

rr_RedemptionFee

none

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.40%

^[1]

Total Annual Fund Operating Expenses After Fee Waiver and Reimbursement

rr_ExpensesOverAssets

1.50%

Fee Waiver and Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.15%)

^[3]

Total Annual Fund Operating Expenses

rr_NetExpensesOverAssets

1.65%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

719

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,149

Catalyst/CP Focus Mid Cap Fund | Class C

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the original purchase price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Maximum Sales Charge (Load) Imposed on Reinvested Dividends and other Distributions

rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther

none

Redemption Fee

rr_RedemptionFee

none

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

0.40%

^[1]

Total Annual Fund Operating Expenses After Fee Waiver and Reimbursement

rr_ExpensesOverAssets

2.25%

Fee Waiver and Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.15%)

^[3]

Total Annual Fund Operating Expenses

rr_NetExpensesOverAssets

2.40%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

228

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

734

[1] Estimated for the current fiscal year.

[2] Acquired Fund Fees and Expenses are the indirect costs of investing in other investment companies. The operating expenses in this fee table will not correlate to the expense ratio in the Fund's financial highlights because the financial statements include only the direct operating expenses incurred by the Fund, not the indirect costs of investing in other investment companies.

[3] The advisor has contractually agreed to waive fees and/or reimburse expenses of the Fund through December 31, 2012. This agreement may be terminated by the Fund's Board of Trustees on 60 days' written notice to the advisor.