SPX or $SPX is the symbol you would use on the Scottrade system for the S&P 500 Index.
P is a permutation. It is asking for the numbers in the ()'s after it. For exapmle, P(6,4) is 6x5x4 which is 120.
S is the symbol of Sulphur and P is the symbol for Phosphorus. Since the symbols of two elements cannot be the same, the symbol of Sodium is Na (taken from its latin name "natrium") and that of potassium is K (taken from its latin name '"kalium").
The Moody's symbol that is roughly equivalent to S&P's "A-" is "A3".
The ticker symbol for the S&P 500 index varies. Some examples of the symbol are ^GSPC, .INX, $SPX, and .SPX
The symbol for PowerShares S&P SmallCap Energy Portfolio in NASDAQ is: PSCE.
The symbol for PowerShares S&P SmallCap Financials Portfolio in NASDAQ is: PSCF.
The symbol for PowerShares S&P SmallCap Industrials Portfolio in NASDAQ is: PSCI.
The symbol for PowerShares S&P SmallCap Materials Portfolio in NASDAQ is: PSCM.
The symbol for PowerShares S&P SmallCap Utilities Portfolio in NASDAQ is: PSCU.
MetroPCS Communications Inc. is traded under the ticker symbol of PCS and is a component of the S&P 500
The chemical symbol of phosphorus is P.