485BPOS

1933 Act File No.	33-52149
1940 Act File No.	811-7141

Form N-1A

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
	Pre-Effective Amendment No.
	Post-Effective Amendment No.	57
and/or
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940
	Amendment No.	58

FEDERATED WORLD INVESTMENT SERIES, INC.

(Exact Name of Registrant as Specified in Charter)

Federated Investors Funds

4000 Ericsson Drive

Warrendale, PA 15086-7561

(Address of Principal Executive Offices)

(412) 288-1900

(Registrant’s Telephone Number, including Area Code)

John W. McGonigle, Esquire

Federated Investors Tower

Pittsburgh, Pennsylvania 15222-3779

(Name and Address of Agent for Service)

It is proposed that this filing will become effective (check appropriate box):
X	immediately upon filing pursuant to paragraph (b)
	on	pursuant to paragraph (b)
	60 days after filing pursuant to paragraph (a)(1)
	on	pursuant to paragraph (a)(1)
	75 days after filing pursuant to paragraph (a)(2)
	on	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 of 1933, and the Investment Company Act of 1940, the Registrant, FEDERATED WORLD INVESTMENT SERIES, INC., certifies that it meets all of the requirements for effectiveness of this Amendment to its Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Amendment to its Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Pittsburgh and Commonwealth of Pennsylvania, on the 15^th day of July, 2013.

FEDERATED WORLD INVESTMENT SERIES, INC.

BY:

/s/ Todd P. Zerega

Todd P. Zerega, Assistant Secretary

Pursuant to the requirements of the Securities Act of 1933, this Amendment to its Registration Statement has been signed below by the following person in the capacity and on the date indicated:

NAME	TITLE	DATE
BY: /s/ Todd P. Zerega Todd P. Zerega, Assistant Secretary	Attorney In Fact For the Persons Listed Below	July 15, 2013
John F. Donahue *	Director
J. Christopher Donahue *	President and Director (Principal Executive Officer)
Lori A. Hensler*	Treasurer (Principal Financial Officer)
Maureen Lally-Green*	Director
Peter E. Madden*	Director
Charles F. Mansfield, Jr.*	Director
Thomas O’Neill*	Director
John S. Walsh*	Director
*By Power of Attorney

Federated Emerging Market Debt Fund

Federated International Leaders Fund

Federated International Small-Mid Company Fund

Portfolios of Federated World Investment Series, Inc.

Post-Effective Amendment No. 57

This Post-Effective Amendment is filed for the sole purpose of submitting the XBRL Interactive Data File exhibits for the Risk/Return Summaries of the above-named Funds filed as part of Post-Effective Amendment No. 55 on June 24, 2013.  The exhibits filed herewith do not constitute the complete publicly filed disclosure for the Funds, and should be used in conjunction with the complete prospectuses for the Funds.

Exhibit List for Interactive Data File Submissions.

EX-101.INS	INSTANCE
EX-101.SCH	SCHEMA
EX-101.CAL	CALCULATION LINKBASE
EX-101.DEF	DEFINITION LINKBASE
EX-101.LAB	LABEL LINKBASE
EX-101.PRE	PRESENTATION LINKBASE

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	FEDERATED WORLD INVESTMENT SERIES INC
Prospectus Date	rr_ProspectusDate	Jun. 24, 2013
Federated International Leaders Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	Federated International Leaders Fund (the "Fund")
Objective [Heading]	rr_ObjectiveHeading	RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund's investment objective is to provide long-term capital growth.
Expense [Heading]	rr_ExpenseHeading	RISK/RETURN SUMMARY: FEES AND EXPENSES
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	This table describes the fees and expenses that you may pay if you buy and hold the Fund's Class R Shares (R).
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)
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	July 1, 2014
Fee Waiver Or Reimbursement Over Assets Later Of Termination Or Next Effective Prospectus	fwisi1_FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus	up to but not including the later of (the "Termination Date"): (a) July 1, 2014; or (b) the date of the Fund's next effective Prospectus.
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 rate 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. During the most recent fiscal year, the Fund's portfolio turnover rate was 16% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	16.00%
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 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 operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading]	rr_StrategyHeading	RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE What are the Fund's Main Investment Strategies?
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Fund pursues its investment objective by investing primarily in a portfolio of equity securities issued by foreign companies that the Fund's investment adviser has deemed as undervalued relative to the company; the company's competitive position and/or its growth prospects. The Fund's investment adviser expects that, normally, the Fund's portfolio will be invested primarily in foreign stocks in developed markets. The Fund is permitted, however, to invest in companies from both developed (including the United States) and emerging market countries. The Fund may invest in exchange-traded funds, derivative contracts (such as options, swaps and futures contracts) and hybrid instruments (such as notes linked to underlying securities, indices or commodities) in order to implement its investment strategies. The Fund is intended to integrate the value style of investing across foreign stocks in a broader equity portfolio.
Risk [Heading]	rr_RiskHeading	What are the Main Risks of Investing in the Fund?
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	All mutual funds take investment risks. Therefore, it is possible to lose money by investing in the Fund. The primary factors that may reduce the Fund's returns include: Stock Market Risk. The value of equity securities in the Fund's portfolio will fluctuate and, as a result, the Fund's Share price may decline suddenly or over a sustained period of time. Information publicly available about a company, whether from the company's financial statements or other disclosures or from third parties, or information available to some but not all market participants, can affect the price of a company's shares in the market. Risk of Foreign Investing. The foreign markets in which the Fund invests may be subject to economic or political conditions which are less favorable than those of the United States and may lack financial reporting standards or regulatory requirements comparable to those applicable to U.S. companies. Risk of Investing in ADRs and Domestically Traded Securities of Foreign Issuers. Because the Fund may invest in American Depositary Receipts and other domestically traded securities of foreign companies, the Fund's Share price may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case. Currency Risk. Because the exchange rates for currencies fluctuate daily, prices of the foreign securities in which the Fund invests are more volatile than prices of securities traded exclusively in the United States. Eurozone Related Risk. A number of countries in the European Union (EU) have experienced, and may continue to experience, severe economic and financial difficulties. Additional EU member countries may also fall subject to such difficulties. These events could negatively affect the value and liquidity of the Fund's investments in euro-denominated securities and derivative contracts, securities of issuers located in the EU or with significant exposure to EU issuers or countries. Sector Risk. Because the Fund may allocate relatively more assets to certain industry sectors than others, the Fund's performance may be more susceptible to any developments which affect those sectors emphasized by the Fund. Risk Related to Investing for Value. Due to their relatively low valuations, value stocks are typically less volatile than growth stocks. However, value stocks may lag behind growth stocks in an up market. Risk of Investing in Emerging Market Countries. Securities issued or traded in emerging markets generally entail greater risks than securities issued or traded in developed markets. Emerging market countries may have relatively unstable governments and may present the risk of nationalization of businesses, expropriation, confiscatory taxation or, in certain instances, reversion to closed market, centrally planned economies. Custodial Services and Related Investment Costs. Custodial services and other costs relating to investment in international securities markets generally are more expensive due to differing settlement and clearance procedures than those of the United States. The inability of the Fund to make intended securities purchases due to settlement problems could cause the Fund to miss attractive investment opportunities. In addition, security settlement and clearance procedures in some emerging market countries may not fully protect the Fund against loss of its assets. Exchange-Traded Funds Risk. An investment in an ETF generally presents the same primary risks as an investment in a conventional fund (i.e., one that is not exchange traded). In addition, ETFs may be subject to the following risks that do not apply to conventional funds: (i) the market price of an ETF's shares may trade above or below their net asset value; (ii) an active trading market for an ETF's shares may not develop or be maintained; or (iii) trading of an ETF's shares may be halted if the listing exchange's officials deem such action appropriate. Risk of Investing in Derivative Contracts and Hybrid Instruments. Derivative contracts and hybrid instruments involve risks different from, or possibly greater than, risks associated with investing directly in securities and other traditional investments. Specific risk issues related to the use of such contracts and instruments include valuation and tax issues, increased potential for losses and/or costs to the Fund, and a potential reduction in gains to the Fund. Each of these issues is described in greater detail in this Prospectus. Derivative contracts and hybrid instruments may also involve other risks described in this Prospectus or the Fund's Statement of Additional Information, such as stock market, interest rate, credit, currency, liquidity and leverage risks. Liquidity Risk. Trading opportunities are more limited for equity securities that are not widely held. This may make it more difficult to sell or buy a security at a favorable price or time. Liquidity risk also refers to the possibility that the Fund may not be able to sell a security or close out a derivative contract when it wants to. Leverage Risk. Leverage risk is created when an investment, which includes, for example, an investment in a derivative contract, exposes the Fund to a level of risk that exceeds the amount invested. Changes in the value of such an investment magnify the Fund's risk of loss and potential for gain. Investments can have these same results if their returns are based on a multiple of a specified index, security or other benchmark. Counterparty Credit Risk. Credit risk includes the possibility that a party to a transaction involving the Fund will fail to meet its obligations. This could cause the Fund to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategy. Technology Risk. Proprietary and third-party data systems are utilized to support decision making for the Fund. Data imprecision, software or other technology malfunctions, programming inaccuracies and similar circumstances may impair the performance of these systems, which may negatively affect Fund performance. The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.
Risk Lose Money [Text]	rr_RiskLoseMoney	All mutual funds take investment risks. Therefore, it is possible to lose money by investing in the Fund.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	Performance: Bar Chart and Table Risk/Return Bar Chart
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The bar chart and performance table below reflect historical performance data for the Fund. The Fund's Class R Shares ("R class") will commence operations on or about June 24, 2013. The Fund currently offers four other classes of shares: Class A Shares ("A class"), Class B Shares, Class C Shares and Institutional Shares. For the periods prior to commencement of operations of the Fund's R class, the R class performance information shown below is for the Fund's A class adjusted to reflect the expenses of the Fund's R class for each year for which the expenses of the Fund's R class would have exceeded the actual expenses paid by the Fund's A class. The performance shown in the table below also has been adjusted to reflect the differences between the sales loads and charges imposed on the purchase and redemption of the Fund's A class and R class. The bar chart and performance table below are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's R class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns averaged over the stated periods, and includes comparative performance information. The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The bar chart shows the variability of the Fund's R class total returns on a calendar year-by-year basis.
Performance One Year or Less [Text]	rr_PerformanceOneYearOrLess	The Fund's Class R Shares ("R class") will commence operations on or about June 24, 2013.
Performance Availability Phone [Text]	rr_PerformanceAvailabilityPhone	1-800-341-7400
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	FederatedInvestors.com
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results.
Bar Chart [Heading]	rr_BarChartHeading	Federated International Leaders Fund - R Class
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	The Fund's R class total return for the three-month period from January 1, 2013 to March 31, 2013 was 3.00%. Within the periods shown in the bar chart, the Fund's R class highest quarterly return was 33.08% (quarter ended June 30, 2009). Its lowest quarterly return was (25.72)% (quarter ended September 30, 2011).
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Total Return Table
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	The Fund's R class will commence operations on or about June 24, 2013. For the periods prior to the commencement of operations of the Fund's R class, the performance information shown below is for the Fund's A class adjusted, as described above. (For the Period Ended December 31, 2012)
Federated International Leaders Fund | R
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, as applicable)	rr_MaximumDeferredSalesChargeOverOther	none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends (and other Distributions) (as a percentage of offering price)	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee (as a percentage of amount redeemed, if applicable)	rr_RedemptionFeeOverRedemption	none
Exchange Fee	rr_ExchangeFeeOverRedemption	none
Management Fee	rr_ManagementFeesOverAssets	0.90%
Distribution (12b-1) Fee	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other Expenses	rr_OtherExpensesOverAssets	0.45%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.86%
Fee Waivers and/or Expense Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	0.40%	[1]
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements	rr_NetExpensesOverAssets	1.46%
1 Year	rr_ExpenseExampleYear01	$ 189
3 Years	rr_ExpenseExampleYear03	585
5 Years	rr_ExpenseExampleYear05	1,006
10 Years	rr_ExpenseExampleYear10	$ 2,180
2003	rr_AnnualReturn2003	34.54%
2004	rr_AnnualReturn2004	14.76%
2005	rr_AnnualReturn2005	14.42%
2006	rr_AnnualReturn2006	27.67%
2007	rr_AnnualReturn2007	8.63%
2008	rr_AnnualReturn2008	(41.72%)
2009	rr_AnnualReturn2009	49.44%
2010	rr_AnnualReturn2010	18.58%
2011	rr_AnnualReturn2011	(18.64%)
2012	rr_AnnualReturn2012	29.97%
Year to Date Return, Label	rr_YearToDateReturnLabel	The Fund's R class total return for the three-month period
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Mar. 31, 2013
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	3.00%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	highest quarterly return
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	33.08%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	lowest quarterly return
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2011
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(25.72%)
1 Year	rr_AverageAnnualReturnYear01	29.97%
5 Years	rr_AverageAnnualReturnYear05	1.78%
10 Years	rr_AverageAnnualReturnYear10	10.34%
Federated International Leaders Fund | Morgan Stanley Capital International Europe, Australasia and Far East Index (reflects no deduction for fees, expenses or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	17.32%	[2]
5 Years	rr_AverageAnnualReturnYear05	(3.69%)	[2]
10 Years	rr_AverageAnnualReturnYear10	8.21%	[2]

[1] The Adviser and its affiliates have voluntarily agreed to waive their fees and/or reimburse expenses so that the total annual fund operating expenses (excluding Acquired Fund Fees and Expenses and Tax Reclaim Recovery Expenses) paid by the Fund's R class (after the voluntary waivers and/or reimbursements) will not exceed 1.45% (the "Fee Limit"), respectively, up to but not including the later of (the "Termination Date"): (a) July 1, 2014; or (b) the date of the Fund's next effective Prospectus. While the Adviser and its affiliates currently do not anticipate terminating or increasing these arrangements prior to the Termination Date, these arrangements may only be terminated or the Fee Limit increased prior to the Termination Date with the agreement of the Fund's Board of Directors.

[2] The Morgan Stanley Capital International Europe, Australasia and Far East Index is an unmanaged market capitalization-weighted equity index comprising 21 of the 46 countries in the Morgan Stanley Capital International universe and representing the developed world outside of North America. MSCI Index (Net) returns are calculated after taking into account dividend withholding rates applicable to non-resident persons who do not benefit from double taxation treaties. However, withholding rates applicable to the Fund may be lower.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	FEDERATED WORLD INVESTMENT SERIES INC
Prospectus Date	rr_ProspectusDate	Jun. 24, 2013
Document Creation Date	dei_DocumentCreationDate	Jun. 24, 2013

XML

Federated International Leaders Fund

Federated International Leaders Fund (the "Fund")

RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE

The Fund's investment objective is to provide long-term capital growth.

RISK/RETURN SUMMARY: FEES AND EXPENSES

This table describes the fees and expenses that you may pay if you buy and hold the Fund's Class R Shares (R).

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	Federated International Leaders Fund R
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, as applicable)	none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends (and other Distributions) (as a percentage of offering price)	none
Redemption Fee (as a percentage of amount redeemed, if applicable)	none
Exchange Fee	none

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

Annual Fund Operating Expenses		Federated International Leaders Fund R
Management Fee		0.90%
Distribution (12b-1) Fee		0.50%
Other Expenses		0.45%
Acquired Fund Fees and Expenses		0.01%
Total Annual Fund Operating Expenses		1.86%
Fee Waivers and/or Expense Reimbursements	[1]	0.40%
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements		1.46%

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 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 operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	1 Year	3 Years	5 Years	10 Years
Federated International Leaders Fund R	189	585	1,006	2,180

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 rate 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. During the most recent fiscal year, the Fund's portfolio turnover rate was 16% of the average value of its portfolio.

RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE

What are the Fund's Main Investment Strategies?

The Fund pursues its investment objective by investing primarily in a portfolio of equity securities issued by foreign companies that the Fund's investment adviser has deemed as undervalued relative to the company; the company's competitive position and/or its growth prospects. The Fund's investment adviser expects that, normally, the Fund's portfolio will be invested primarily in foreign stocks in developed markets. The Fund is permitted, however, to invest in companies from both developed (including the United States) and emerging market countries. The Fund may invest in exchange-traded funds, derivative contracts (such as options, swaps and futures contracts) and hybrid instruments (such as notes linked to underlying securities, indices or commodities) in order to implement its investment strategies. The Fund is intended to integrate the value style of investing across foreign stocks in a broader equity portfolio.

What are the Main Risks of Investing in the Fund?

All mutual funds take investment risks. Therefore, it is possible to lose money by investing in the Fund. The primary factors that may reduce the Fund's returns include:

• Stock Market Risk. The value of equity securities in the Fund's portfolio will fluctuate and, as a result, the Fund's Share price may decline suddenly or over a sustained period of time. Information publicly available about a company, whether from the company's financial statements or other disclosures or from third parties, or information available to some but not all market participants, can affect the price of a company's shares in the market.

• Risk of Foreign Investing. The foreign markets in which the Fund invests may be subject to economic or political conditions which are less favorable than those of the United States and may lack financial reporting standards or regulatory requirements comparable to those applicable to U.S. companies.

• Risk of Investing in ADRs and Domestically Traded Securities of Foreign Issuers. Because the Fund may invest in American Depositary Receipts and other domestically traded securities of foreign companies, the Fund's Share price may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.

• Currency Risk. Because the exchange rates for currencies fluctuate daily, prices of the foreign securities in which the Fund invests are more volatile than prices of securities traded exclusively in the United States.

• Eurozone Related Risk. A number of countries in the European Union (EU) have experienced, and may continue to experience, severe economic and financial difficulties. Additional EU member countries may also fall subject to such difficulties. These events could negatively affect the value and liquidity of the Fund's investments in euro-denominated securities and derivative contracts, securities of issuers located in the EU or with significant exposure to EU issuers or countries.

• Sector Risk. Because the Fund may allocate relatively more assets to certain industry sectors than others, the Fund's performance may be more susceptible to any developments which affect those sectors emphasized by the Fund.

• Risk Related to Investing for Value. Due to their relatively low valuations, value stocks are typically less volatile than growth stocks. However, value stocks may lag behind growth stocks in an up market.

• Risk of Investing in Emerging Market Countries. Securities issued or traded in emerging markets generally entail greater risks than securities issued or traded in developed markets. Emerging market countries may have relatively unstable governments and may present the risk of nationalization of businesses, expropriation, confiscatory taxation or, in certain instances, reversion to closed market, centrally planned economies.

• Custodial Services and Related Investment Costs. Custodial services and other costs relating to investment in international securities markets generally are more expensive due to differing settlement and clearance procedures than those of the United States. The inability of the Fund to make intended securities purchases due to settlement problems could cause the Fund to miss attractive investment opportunities. In addition, security settlement and clearance procedures in some emerging market countries may not fully protect the Fund against loss of its assets.

• Exchange-Traded Funds Risk. An investment in an ETF generally presents the same primary risks as an investment in a conventional fund (i.e., one that is not exchange traded). In addition, ETFs may be subject to the following risks that do not apply to conventional funds: (i) the market price of an ETF's shares may trade above or below their net asset value; (ii) an active trading market for an ETF's shares may not develop or be maintained; or (iii) trading of an ETF's shares may be halted if the listing exchange's officials deem such action appropriate.

• Risk of Investing in Derivative Contracts and Hybrid Instruments. Derivative contracts and hybrid instruments involve risks different from, or possibly greater than, risks associated with investing directly in securities and other traditional investments. Specific risk issues related to the use of such contracts and instruments include valuation and tax issues, increased potential for losses and/or costs to the Fund, and a potential reduction in gains to the Fund. Each of these issues is described in greater detail in this Prospectus. Derivative contracts and hybrid instruments may also involve other risks described in this Prospectus or the Fund's Statement of Additional Information, such as stock market, interest rate, credit, currency, liquidity and leverage risks.

• Liquidity Risk. Trading opportunities are more limited for equity securities that are not widely held. This may make it more difficult to sell or buy a security at a favorable price or time. Liquidity risk also refers to the possibility that the Fund may not be able to sell a security or close out a derivative contract when it wants to.

• Leverage Risk. Leverage risk is created when an investment, which includes, for example, an investment in a derivative contract, exposes the Fund to a level of risk that exceeds the amount invested. Changes in the value of such an investment magnify the Fund's risk of loss and potential for gain. Investments can have these same results if their returns are based on a multiple of a specified index, security or other benchmark.

• Counterparty Credit Risk. Credit risk includes the possibility that a party to a transaction involving the Fund will fail to meet its obligations. This could cause the Fund to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategy.

• Technology Risk. Proprietary and third-party data systems are utilized to support decision making for the Fund. Data imprecision, software or other technology malfunctions, programming inaccuracies and similar circumstances may impair the performance of these systems, which may negatively affect Fund performance.

The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.

Performance: Bar Chart and Table

Risk/Return Bar Chart

The bar chart and performance table below reflect historical performance data for the Fund. The Fund's Class R Shares ("R class") will commence operations on or about June 24, 2013. The Fund currently offers four other classes of shares: Class A Shares ("A class"), Class B Shares, Class C Shares and Institutional Shares.

For the periods prior to commencement of operations of the Fund's R class, the R class performance information shown below is for the Fund's A class adjusted to reflect the expenses of the Fund's R class for each year for which the expenses of the Fund's R class would have exceeded the actual expenses paid by the Fund's A class. The performance shown in the table below also has been adjusted to reflect the differences between the sales loads and charges imposed on the purchase and redemption of the Fund's A class and R class.

The bar chart and performance table below are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's R class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns averaged over the stated periods, and includes comparative performance information. The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.

Federated International Leaders Fund - R Class

The Fund's R class total return for the three-month period from January 1, 2013 to March 31, 2013 was 3.00%.

Within the periods shown in the bar chart, the Fund's R class highest quarterly return was 33.08% (quarter ended June 30, 2009). Its lowest quarterly return was (25.72)% (quarter ended September 30, 2011).

Average Annual Total Return Table

The Fund's R class will commence operations on or about June 24, 2013. For the periods prior to the commencement of operations of the Fund's R class, the performance information shown below is for the Fund's A class adjusted, as described above.

(For the Period Ended December 31, 2012)

Average Annual Total Returns Federated International Leaders Fund		1 Year	5 Years	10 Years
R		29.97%	1.78%	10.34%
Morgan Stanley Capital International Europe, Australasia and Far East Index (reflects no deduction for fees, expenses or taxes)	[1]	17.32%	(3.69%)	8.21%

[1] The Adviser and its affiliates have voluntarily agreed to waive their fees and/or reimburse expenses so that the total annual fund operating expenses (excluding Acquired Fund Fees and Expenses and Tax Reclaim Recovery Expenses) paid by the Fund's R class (after the voluntary waivers and/or reimbursements) will not exceed 1.45% (the "Fee Limit"), respectively, up to but not including the later of (the "Termination Date"): (a) July 1, 2014; or (b) the date of the Fund's next effective Prospectus. While the Adviser and its affiliates currently do not anticipate terminating or increasing these arrangements prior to the Termination Date, these arrangements may only be terminated or the Fee Limit increased prior to the Termination Date with the agreement of the Fund's Board of Directors.

[1] The Morgan Stanley Capital International Europe, Australasia and Far East Index is an unmanaged market capitalization-weighted equity index comprising 21 of the 46 countries in the Morgan Stanley Capital International universe and representing the developed world outside of North America. MSCI Index (Net) returns are calculated after taking into account dividend withholding rates applicable to non-resident persons who do not benefit from double taxation treaties. However, withholding rates applicable to the Fund may be lower.

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Document and Entity Information	12 Months Ended
	Jun. 24, 2013
Risk/Return:
Document Type	485BPOS
Document Period End Date	Jun. 24, 2013
Registrant Name	FEDERATED WORLD INVESTMENT SERIES INC
Central Index Key	0000918199
Amendment Flag	false
Document Creation Date	Jun. 24, 2013
Document Effective Date	Jun. 24, 2013
Prospectus Date	Jun. 24, 2013