They have 5 letters, and end with "X". Usually, the first letter is the same as the first letter of the fund family (ie. Fidelity Cash Reserve fund--FDRXX, Vanguard Prime Money Market fund--VMMXX.)
Yes they all have 5 letter tickers and end with X. For example, the institutional shares of PIMCO Total Return are PTTRX. In the case of stable value funds (which are not traded like open-ended mutual funds), the ticker may end in Z. ETFs, on the other hand, tend to have either 3 or 4 letters and are traded like stocks.
A ticker symbol is usually a group of letters that represent a company. An example would be MAN for Manpower.
NLOAX
Walmart is not a mutual fund, rather it is an individual company. The stock symbol is WMT.
Like you, I could not find any ticker symbols for these funds. You could ask Mutual of America what they are. Where do you have these funds? Is it in your 401k plan? Some 401k plans have funds that do not have a ticker symbol. Usually these funds will be a "kissing cousin" to a fund with a ticker symbol. You could use that fund's symbol to track the fund you have. Here is a link to the fund listing and perfromance of MOA's funds: http://mutualofamerica.com/MOAframe.asp?buthit=inv&Main=investments/performance.aspx
Vanguard is not a publically traded company so it wouldn't have a ticker symbol. It is wholly owned by the mutual funds that it serves. Please read Vanguard.com for further information.
Since it's not a stock company - it doesn't have a ticker symbol.
Mutual Companies are not publicly traded. There is no ticker symbol.
The ticker symbol for the American Funds Capital Income Builder is CAIBX.
LMG
They're not a publicly traded company, they don't have a ticker symbol.
There is no ticker symbol. State Farm is a mutual company.
Groups of funds don't typically have ticker symbols. Individual funds within the group do.
The American Funds Growth Fund of America trades under the ticker symbol AGTHX.