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  2. High-frequency trading - Wikipedia

    en.wikipedia.org/wiki/High-frequency_trading

    An academic study [35] found that, for large-cap stocks and in quiescent markets during periods of "generally rising stock prices", high-frequency trading lowers the cost of trading and increases the informativeness of quotes; [35]: 31 however, it found "no significant effects for smaller-cap stocks", [35]: 3 and "it remains an open question ...

  3. Stock market news live updates: Stocks slide to lowest since ...

    www.aol.com/finance/stock-market-news-live...

    Stock market news live updates: Stocks slide to lowest since March 2021, S&P closes below 4,000. ... Prices for the largest cryptocurrency by market cap dropped below $33,000, or the least since ...

  4. Very high frequency - Wikipedia

    en.wikipedia.org/wiki/Very_high_frequency

    Very high frequency (VHF) is the ITU designation [1] [2] [3] for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. Frequencies immediately below VHF are denoted high frequency (HF), and the next higher frequencies are known as ultra high ...

  5. NITEL (Russian company) - Wikipedia

    en.wikipedia.org/wiki/NITEL_(Russian_company)

    Nitel Joint-Stock Company (Russian: ОАО «Нител») is a company based in Nizhniy Novgorod, Russia. NITEL is among the world's leading producers of VHF air surveillance and surface-to-air missile target acquisition radars; its radars have counter-stealth features. Also a major manufacturer of television receivers, NITEL produces about ...

  6. Barrett Communications - Wikipedia

    en.wikipedia.org/wiki/Barrett_Communications

    Barrett Communications was founded in 1976. The company steadily grew and began exporting their first commercial HF radios in 1987. The range has been expanded to include transceivers (base, portable and mobile), modems, power supplies, amplifiers, antennas and accessories.

  7. Channel 6 radio stations in the United States - Wikipedia

    en.wikipedia.org/wiki/Channel_6_radio_stations...

    These stations transmit an analog FM signal centered on 87.75 MHz, designated by receiver and station marketing as "87.7 FM". This is just below the lowest FM band frequency of 87.9 MHz, and within the internationally recognized Band II, which extends down to 87.5 MHz and is thus receivable by most consumer radios.