For those participants who don't make an investment election, their money may be invested in the target date fund closest to their normal retirement date under the QDIA. (investorjunkie.com)
The reason I chose to max out Roth before my 401 (k) is that I can invest in any fund whereas in my 401 (k) I am limited to my company custodian's investment elections. (financialsamurai.com)
Just looking at the current holdings, investment elections, re-balancing and transfers apply to the entire value of all the investments regardless of the cash source, which is somewhat annoying, but I can live with it. (money.stackexchange.com)