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  2. 6 Different Types of Mutual Funds Explained - AOL

    www.aol.com/finance/6-different-types-mutual...

    Vanguard Federal Money Market Fund (VMFXX) 4. Index Funds. An index fund is a passively managed fund that tracks a specific index, such as the Nasdaq or S&P 500.

  3. 6 best money market funds in February 2025 - AOL

    www.aol.com/finance/6-best-money-market-funds...

    Vanguard Federal Money Market Fund (VMFXX) The Vanguard Federal Money Market Fund invests in cash and short-term securities issued by the U.S. government. The fund aims to provide current income ...

  4. Money market fund - Wikipedia

    en.wikipedia.org/wiki/Money_market_fund

    The fund's published, amortized value may not exceed this market value by more than 1/2 cent per share, a comparison that is generally made weekly. If the variance does exceed $0.005 per share, the fund could be considered to have broken the buck, and regulators may force it into liquidation. Buck breaking has rarely happened.

  5. Silicon photomultiplier - Wikipedia

    en.wikipedia.org/wiki/Silicon_photomultiplier

    G vs. V b dependence is linear and does not follow a power law like in the case of PMTs; Timing jitter is optimized to have a photon arrival time resolution of about 100-300 ps; Signal decay time is inversely proportional to square root of photoelectrons number within an excitation event

  6. 7-day SEC yield - Wikipedia

    en.wikipedia.org/wiki/7-day_SEC_yield

    To calculate approximately how much interest one might earn in a money fund account, take the 7-day SEC yield, multiply by the amount invested, divide by the number of days in the year, and then multiply by the number of days in question. This does not take compounding into effect.

  7. How do certificates of deposit work? Understanding CDs ... - AOL

    www.aol.com/finance/how-do-cds-work-220139365.html

    Brokerage firms work with a network of banks and credit unions to offer a wide variety of CD types and terms. And these firms can often negotiate higher interest rates due to the volume of CDs ...

  8. Insulation monitoring device - Wikipedia

    en.wikipedia.org/wiki/Insulation_monitoring_device

    An insulation monitoring device monitors the ungrounded system between an active phase conductor and earth.It is intended to give an alert (light and sound) or disconnect the power supply when the resistance between the two conductors drops below a set value, usually 50 kΩ (sample of IEC standard for medical applications).

  9. Frequency modulation - Wikipedia

    en.wikipedia.org/wiki/Frequency_modulation

    FM is the only feasible method of recording the luminance ("black-and-white") component of video to (and retrieving video from) magnetic tape without distortion; video signals have a large range of frequency components – from a few hertz to several megahertz, too wide for equalizers to work with due to electronic noise below −60 dB.