Take the $100K and feed it to the paper shredder. Why ? You are asking on an internet forum how to invest $100K ? Take any advice extremely carefully , never know when someone is pointing you towards a scam.
Instead call up or email the different investment companies and banks that have high customer ratings to see what you can get.
Yeah, gosh, there can't be anybody intelligent in financial matters on an internet forum.
Personally, I have an MBA in finance and my CFA charter. I work at an i-bank.
There's plenty of people here with little/no formal education that are very intelligent when it comes to investing.
What about you?
As far as the OP's question. I would invest the cash into a government bonds or a trustworthy high-yield CD (FDIC insured of course), or a high-yield savings account.
At this point there is no need to take any volatility risk on your cash. The reward you get won't be much but you aren't taking much risk either.