0000754510 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member rr:RiskLoseMoneyMember 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member rr:RiskNondiversifiedStatusMember 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member rr:RiskNotInsuredDepositoryInstitutionMember 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member fmr:ForeignExposureMember 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member fmr:GrowthInvestingMember 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member fmr:IssuerSpecificChangesMember 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member fmr:StockMarketVolatilityMember 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member fmr:TechnologyIndustryConcentrationMember 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member fmr:ValueInvestingMember 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member fmr:C000254549Member 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member fmr:C000254550Member 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member fmr:C000254551Member 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member fmr:ReturnBeforeTaxesMember fmr:C000254551Member 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member rr:AfterTaxesOnDistributionsMember fmr:C000254551Member 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member rr:AfterTaxesOnDistributionsAndSalesMember fmr:C000254551Member 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member fmr:C000254552Member 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member fmr:C000254553Member 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member fmr:IndexNS004Member 2024-10-04 2024-10-04 0000754510 fmr:FidelityOTCPortfolio-AMCIZPROMember fmr:S000007191Member fmr:IndexSP001Member 2024-10-04 2024-10-04 iso4217:USD pure shares 485BPOS 2024-07-31 false 0000754510 N-1A Fidelity Securities Fund Fund Summary Fund /Class: Fidelity® OTC Portfolio /Fidelity Advisor® OTC Fund A, M, C, I, Z   Investment Objective Fidelity® OTC Portfolio seeks capital appreciation. Fee Table The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $ 50,000 in the fund or certain other Fidelity ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 32 of the prospectus and in the sales charge waiver appendix to the prospectus.   You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $ 50,000 in the fund or certain other Fidelity ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 32 of the prospectus and in the sales charge waiver appendix to the prospectus. 50000 Shareholder fees 0.0575 0.0350 0 0 0 0 0 0.0100 0 0 A       Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% and 0.25%, respectively. B       On Class C shares redeemed less than one year after purchase. Annual Operating Expenses 0.0077 0.0077 0.0077 0.0077 0.0065 0.0025 0.0050 0.0100 0 0 0.0001 0.0001 0.0001 0.0001 0.0001 0.0103 0.0128 0.0178 0.0078 0.0066 Based on estimated amounts for the current fiscal year. This example helps compare the cost of investing in the fund with the cost of investing in other funds. Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares: 674 674 476 476 281 181 80 80 67 67 884 884 742 742 560 560 249 249 211 211 1111 1111 1028 1028 964 964 433 433 368 368 1762 1762 1841 1841 1897 1897 966 966 822 822 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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 37 % of the average value of its portfolio. 0.37 Principal Investment Strategies Normally investing primarily in common stocks. Normally investing at least 80% of assets in securities principally traded on NASDAQ® or an over-the-counter (OTC) market, which has more small and medium-sized companies than other markets. Investing more than 25% of total assets in the technology sector. Investing in domestic and foreign issuers. Investing in either "growth" stocks or "value" stocks or both. Using fundamental analysis of factors such as each issuer's financial condition and industry position, as well as market and economic conditions, to select investments. Principal Investment Risks Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Technology Industry Concentration. The technology industries can be significantly affected by obsolescence of existing technology, short product cycles, falling prices and profits, competition from new market entrants, and general economic conditions. Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. The value of securities of smaller issuers can be more volatile than that of larger issuers. "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks.       "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. In addition, the fund is classified as non-diversified under the Investment Company Act of 1940 (1940 Act), which means that it has the ability to invest a greater portion of assets in securities of a smaller number of individual issuers than a diversified fund. As a result, changes in the market value of a single investment could cause greater fluctuations in share price than would occur in a more diversified fund. An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency .   You could lose money by investing in the fund. Performance The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of Fidelity® OTC Portfolio, a class of shares of the fund, from year to year and compares the performance of this class to the performance of a securities market index and an additional index over various periods of time. The additional index has characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance. Visit www.fidelity.com for more recent performance information for Fidelity® OTC Portfolio, a class of shares of Fidelity® OTC Portfolio. Performance history will be available at institutional.fidelity.com for Class A, Class M, Class C, Class I, and Class Z after Class A, Class M, Class C, Class I, and Class Z have been in operation for one calendar year. The information illustrates the changes in the performance of Fidelity® OTC Portfolio, a class of shares of the fund, from year to year and compares the performance of this class to the performance of a securities market index and an additional index over various periods of time. Past performance (before and after taxes) is not an indication of future performance. www.fidelity.com Performance history will be available at institutional.fidelity.com for Class A, Class M, Class C, Class I, and Class Z after Class A, Class M, Class C, Class I, and Class Z have been in operation for one calendar year. Year-by-Year Returns 0.1649 0.1092 0.0311 0.3859 -0.0321 0.3922 0.4679 0.2504 -0.3212 0.4264    Highest Quarter Return 0.3092 2020-06-30    Lowest Quarter Return -0.2222 2022-06-30    Year-to-Date Return 0.2488 2024-06-30 * The returns shown above are for Fidelity® OTC Portfolio, a class of shares of the fund that is not offered through this prospectus. Class A, Class M, Class C, Class I, and Class Z   would have substantially similar annual returns to Fidelity® OTC Portfolio because the classes are invested in the same portfolio of securities. Class A's, Class M's, Class C's, Class I's, and Class Z's   returns would differ from Fidelity® OTC Portfolio's returns only to the extent that the classes do not have the same expenses. Average Annual Returns After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares. Return Before Taxes 0.4264 0.1986 0.1603 Return After Taxes on Distributions 0.4262 0.1808 0.1411 Return After Taxes on Distributions and Sale of Fund Shares 0.2525 0.1579 0.1275 Nasdaq Composite Index® 0.4464 0.1875 0.1480 S&P 500® Index 0.2629 0.1569 0.1203 * The returns shown above are for Fidelity® OTC Portfolio, a class of shares of the fund that is not offered through this prospectus.     Class A, Class M, Class C, Class I, and Class Z would have substantially similar annual returns to Fidelity® OTC Portfolio because the classes are invested in the same portfolio of securities. Class A's, Class M's, Class C's, Class I's, and Class Z's returns would differ from Fidelity® OTC Portfolio's returns only to the extent that the classes do not have the same expenses. A    Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% and 0.25%, respectively. B    On Class C shares redeemed less than one year after purchase. A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down (subject to a maximum rate) based on the performance of the fund or a designated class of the fund relative to that of the Nasdaq Composite Index®. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information. B Based on estimated amounts for the current fiscal year.