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  2. List of S&P 400 companies - Wikipedia

    en.wikipedia.org/wiki/List_of_S&P_400_companies

    S&P SmallCap 600 constituent Papa John's International Inc. (NASD: PZZA) will replace Post Properties Inc. (NYSE: PPS) in the S&P MidCap 400, and Wingstop Inc. (NASD: WING) will replace Papa John's International in the S&P SmallCap 600. Mid-America Apartment Communities is acquiring Post Properties. LM. Legg Mason.

  3. Sigma bond - Wikipedia

    en.wikipedia.org/wiki/Sigma_bond

    When viewed down the bond axis, a σ MO has a circular symmetry, hence resembling a similarly sounding "s" atomic orbital. Typically, a single bond is a sigma bond while a multiple bond is composed of one sigma bond together with pi or other bonds. A double bond has one sigma plus one pi bond, and a triple bond has one sigma plus two pi bonds

  4. List of S&P 600 companies - Wikipedia

    en.wikipedia.org/wiki/List_of_S&P_600_companies

    This is a list of companies having stocks that are included in the S&P SmallCap 600.The S&P 600 is an index of small-cap company stocks created by Standard & Poor's, selected by a committee based on recent profitablity and other factors.

  5. S&P 400 - Wikipedia

    en.wikipedia.org/wiki/S&P_400

    Overview. The index serves as a gauge for the U.S. mid-cap equities sector and is the most widely followed mid-cap index. It is part of the S&P 1500, which also includes the S&P 500 for larger U.S. based companies, and the S&P 600 for smaller companies, though all three indices include a handful of foreign stocks that trade on the U.S. stock exchanges.

  6. List of countries by credit rating - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    Fitch has withdrawn all ratings for Libya because it does not have enough information to maintain coverage of the issuer. [371] Malawi. Mali. Mali was given a credit rating in 2004 as part of a UN development initiative, [372] but the rating was later withdrawn. [373] Marshall Islands. Mauritania.

  7. Procter & Gamble - Wikipedia

    en.wikipedia.org/wiki/Procter_&_Gamble

    The Procter & Gamble Company ( P&G) is an American multinational consumer goods corporation headquartered in Cincinnati, Ohio, founded in 1837 [3] by William Procter and James Gamble. [4] It specializes in a wide range of personal health/consumer health, personal care and hygiene products; these products are organized into several segments ...

  8. Polarizer - Wikipedia

    en.wikipedia.org/wiki/Polarizer

    A stack of plates at Brewster's angle to a beam reflects off a fraction of the s-polarized light at each surface, leaving a p-polarized beam. Full polarization at Brewster's angle requires many more plates than shown. The arrows indicate the direction of the electrical field, not the magnetic field, which is perpendicular to the electric field

  9. Phosphorus - Wikipedia

    en.wikipedia.org/wiki/Phosphorus

    Phosphorus is a chemical element; it has symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Earth.