XML 11 R5.htm IDEA: XBRL DOCUMENT v3.10.0.1
Label Element Value
Risk Return Abstract rr_RiskReturnAbstract  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Oct. 23, 2018
Registrant Name dei_EntityRegistrantName RBB FUND, INC.
Central Index Key dei_EntityCentralIndexKey 0000831114
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Oct. 23, 2018
Document Effective Date dei_DocumentEffectiveDate Oct. 23, 2018
Prospectus Date rr_ProspectusDate Oct. 23, 2018
Motley Fool Small-Cap Growth ETF  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading <p style="font: bold 11pt Times New Roman, Times, Serif; margin: 0; text-transform: uppercase; text-align: center; text-indent: 0in">Motley Fool Small-Cap Growth ETF</p> <p style="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: center"><font style="text-transform: uppercase"><i> </i></font></p> <p style="font: bold 11pt Times New Roman, Times, Serif; margin: 0; text-transform: uppercase; text-align: center; text-indent: 0in">Summary Section</p>
Objective [Heading] rr_ObjectiveHeading <p style="font: bold 11pt Times New Roman, Times, Serif; margin: 0">Investment Objective</p>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The investment objective of the Motley Fool Small-Cap Growth ETF (the “Fund”) is to achieve long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <p style="font: bold 11pt Times New Roman, Times, Serif; margin: 0">Fees and Expenses</p>
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 (“Shares”). This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <p style="font: 11pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><font style="font-size: 11pt"><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):</b></font></p>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <p style="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0in"><b><i>Portfolio Turnover </i></b></p>
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. Information on fund portfolio turnover will be noted once the Fund has an operating history.
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates "Other Expenses" have been estimated to reflect expenses expected to be incurred during the current fiscal year.
Expense Example [Heading] rr_ExpenseExampleHeading <p style="font: bold 11pt Times New Roman, Times, Serif; margin: 0"><i>Example</i></p>
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 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: (1) your investment has a 5% return each year, and (2) 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 <p style="font: 11pt Times New Roman, Times, Serif; margin: 0"><b>Principal Investment Strategies</b></p>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund is an actively-managed exchange-traded fund (“ETF”) and invests primarily in equity securities of small capitalization companies listed on a United States exchange and selected by Motley Fool Asset Management, LLC, the Fund’s investment adviser (the “Adviser”). The Fund pursues its investment objective by using a quality growth style. The Fund invests in a focused portfolio of the common stocks of high-quality companies organized in the United States that are engaged in a broad range of industries.

 

Under normal market conditions, the Fund invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities issued by small capitalization companies. For this purpose, the Adviser currently defines small capitalization companies as being within the same range of market capitalizations as the companies in the Russell 2000 Growth Index (the “Index”). The Index is used for the purpose of determining ranges of market capitalizations and not for targeting portfolio management. Under normal circumstances, the Fund seeks to stay fully invested and does not attempt to time the market. The Fund is non-diversified, which means that it may invest a significant portion of its assets in the securities of a single issuer or small number of issuers. In addition, at any given time, the Fund may have a significant portion of its net assets invested in securities of issuers within a particular sector, such as the information technology, health care, industrial and consumer discretionary sectors.

 

In identifying investments for the Fund, the Adviser looks for securities of companies that have high-quality businesses with strong market positions, manageable leverage, robust streams of free cash flow. In managing the Fund’s investment portfolio, the Adviser regularly reviews and adjusts the Fund’s allocations to maintain a mix of investments that the Adviser believes offer the best overall potential for long-term growth of capital. The Fund will sell securities in which it has invested based upon the Adviser’s analysis of fundamental investment criteria, including its assessment of the current value of a security relative to the security’s current market price, business fundamentals relating to the issuer, and developments affecting the issuer’s business prospects and risks.

 

The Fund prefers to invest in high-quality businesses when possible. To identify these high-quality businesses, the Adviser engages in research to evaluate each company under consideration using four criteria described in more detail below: (i) management, culture, and incentives; (ii) the economics of the business; (iii) competitive advantage; and (iv) the durability of its competitive advantage period. The Adviser’s approach prizes a long-term mindset and a balance of qualitative and quantitative factors.

 

Management, Culture, and Incentives.

The Adviser believes that management is a key element to long-term success at most businesses. Among the factors the Adviser considers are: manager and board of director fit, the clarity of vision and strategies, main-line culture and turnover, ownership in the business, the sensibility of incentives, capital allocation choices and results, external transparency and candor, and overall treatment of stakeholders.

 

Economics of the Business.

The Adviser believes that the economic performance of a business is a signal for quality. The Adviser’s process looks at the company’s long-term return on capital, the scalability of its business model, relative and absolute margins, business and product cyclicality, and other key performance indicators to gain insight into its potential for future performance.

 

Competitive Advantage.

The Adviser seeks companies that offer certain characteristics that allow them to generate and sustain outsized returns on capital on an absolute basis as well as in comparison to their peers. Competitive advantages may include pricing power, geographic barriers to entry, network effects, regulatory barriers to entry and superior brands, among others. The Adviser also assesses the strength of the supporting capabilities each company possesses that reinforce these advantages to result in unique positioning.

 

Durability of Competitive Advantage Period.

Companies often display superior economics over the short term due to favorable product cycles, customer preference, temporary or tactical advantages or other reasons. As the Adviser’s desire is to own companies in the Fund that can be kept in the portfolio for many years, a core part of the Adviser’s process is to consider what the company might look like over a period of ten or more years. The Adviser considers whether the company seems likely to grow, to increase profitability through additional products or other offerings, and if it has optionality and the financial capacity that may make it a larger, stronger business in the future than it might be today.

 

The Fund’s investment portfolio is focused, generally composed of at least 30 investment positions.

 

While investing in a particular sector is not a principal investment strategy of the Fund, its portfolio may be significantly invested in a sector as a result of the portfolio management decisions made pursuant to its principal investment strategy.  While the Fund does not place any restrictions on its level of sector concentration, it will limit its investments in industries within any particular sector to less than 25% of the Fund’s total assets. The Fund may not invest more than 15% of its net assets in illiquid securities.

 

The Fund intends to elect to be, and intends to qualify each year for treatment as a regulated investment company (“RIC”) under Subchapter M of Subtitle A, Chapter 1, of the Internal Revenue Code of 1986, as amended (the “Code”).
Risk [Heading] rr_RiskHeading <p style="font: 11pt Times New Roman, Times, Serif; margin: 0"><b>Principal Investment Risks</b></p>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

The value of the Fund’s investments may decrease, which will cause the value of the Fund’s Shares to decrease. As a result, you may lose money on your investment in the Fund, and there can be no assurance that the Fund will achieve its investment objective.

 

•Authorized Participants, Market Makers and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that are institutional investors and may act as authorized participants (“APs”). In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Fund Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services, or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.
•Equity Market Risk. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, or sectors in which the Fund invests. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stocks and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers.
•Investment Style Risk. The Fund pursues a quality growth style of investing. Quality growth style of investing focuses on companies that appear attractive in light of factors such as the quality of management, sustainability of competitive advantage, or growth potential of cash flow. If the Adviser’s assessment of a company’s quality or intrinsic value or its prospects for exceeding earnings expectations or market conditions is inaccurate, the Fund could suffer losses or produce poor performance relative to other funds. In addition, the stocks of quality companies can continue to be undervalued by the market for long periods of time. As a consequence of its investing style the Fund may underperform the market and its peers over short timeframes.
•Management Risk. The Fund is subject to management risk as an actively-managed investment portfolio. The Adviser’s investment approach may fail to produce the intended results.
•Market Risk. The trading prices of equity securities and other instruments fluctuate in response to a variety of factors. The Fund’s net asset value (“NAV”) and market price may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time.
•New Fund Risk. The Fund is a recently organized, non-diversified management investment company with no operating history. As a result, prospective investors have a limited track record on which to base their investment decision. In addition, there can be no assurance that the Fund will grow to, or maintain, an economically viable size, in which case the Board of Directors (the “Board”) of The RBB Fund, Inc. (the “Company”) may determine to liquidate the Fund.
•Non-Diversification Risk. The Fund is non-diversified, which means that it may invest a high percentage of its assets in a limited number of securities. Since the Fund is non-diversified, its NAV, market price and total returns may fluctuate or fall more than a diversified fund. Gains or losses on a single stock may have a greater impact on the Fund.
•Secondary Market Trading Risk. Although Shares are listed on a national securities exchange, such as Cboe BZX Exchange, Inc. (the “Exchange”) and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active or liquid trading market for them will develop or be maintained. In addition, trading in Shares on the Exchange may be halted.
•Sector Risk. To the extent the Fund invests more heavily in particular sectors of the economy, its performance will be especially sensitive to developments that significantly affect those sectors.
oConsumer Discretionary Sector Risk. Companies in the consumer discretionary sector (which includes companies in industries such as consumer and household durables, consumer services, media, retailing, and automobiles) can be significantly affected by the performance of the overall economy, interest rates, competition, consumer confidence and spending, and changes in demographics and consumer tastes.
oHealth Care Sector Risk. Companies in the health care sector are subject to extensive government regulation and their profitability can be significantly affected by regulatory changes. Other risk factors include rising costs of medical products and services, pricing pressure and limited product lines, loss or impairment of intellectual property rights and litigation regarding product or service liability.
oIndustrial Sector Risk. Companies in the industrials sector could be affected by, among other things, government regulation, world events and economic conditions, insurance costs, and labor relations issues.
oInformation Technology Sector Risk. In addition to market or economic factors, companies in the information technology sector and companies that rely heavily on technology are particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition.
•Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount). This risk is heightened in times of market volatility or periods of steep market declines.
•Small Cap Companies Risk. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of larger-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than larger capitalization stocks or the stock market as a whole. Some small capitalization companies have limited product lines, markets, and financial and managerial resources and tend to concentrate on fewer geographical markets relative to larger capitalization companies. There is typically less publicly available information concerning smaller-capitalization companies than for larger, more established companies. Small-capitalization companies also may be particularly sensitive to changes in interest rates, government regulation, borrowing costs and earnings.
Risk Lose Money [Text] rr_RiskLoseMoney As a result, you may lose money on your investment in the Fund, and there can be no assurance that the Fund will achieve its investment objective.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus The Fund is non-diversified, which means that it may invest a high percentage of its assets in a limited number of securities. Since the Fund is non-diversified, its NAV, market price and total returns may fluctuate or fall more than a diversified fund. Gains or losses on a single stock may have a greater impact on the Fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <p style="font: 11pt Times New Roman, Times, Serif; margin: 0"><b>Performance Information: </b></p>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

Performance information for the Fund is not included because the Fund did not commence operations prior to the date of this Prospectus. In the future, performance information for the Fund will be presented in this section. Updated performance information is available on the Fund’s website at www.mfamfunds.com/resources or by calling the Fund toll free at 1-800-617-0004.

Performance One Year or Less [Text] rr_PerformanceOneYearOrLess Performance information for the Fund is not included because the Fund did not commence operations prior to the date of this Prospectus.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-800-617-0004
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.mfamfunds.com/resources
Motley Fool Small-Cap Growth ETF | Motley Fool Small-Cap Growth ETF Shares  
Risk Return Abstract rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol MFMS
Management Fees rr_ManagementFeesOverAssets 0.85%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets none [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.85%
One Year rr_ExpenseExampleYear01 $ 87
Three Years rr_ExpenseExampleYear03 $ 271
[1] "Other Expenses" have been estimated to reflect expenses expected to be incurred during the current fiscal year.