funds are safe, good funds. They don't have ticker symbols because they are common trust funds
. They usually have reasonable expense ratios, but it depends on your specific plan. Lending vs. Non-lending is an internal issue and you can ignore it.
To find out about the specific funds, type the name into your browser search engine and look for the pdf Fact Sheet. For example, "SSgA S&P 500 Index" gives me this page
. Scrolling down I find the link to this pdf
. The class is different than yours, but that only affects the expense ratio. Everything else is the same.
They are good options. Use them.