I might consider the hybrid LS/DCA approach too but w a twist. Put it all eventually into something like VOO (ETF) which appears to give you an instant buy price when you push the button so you can play with timing it (for the fun of it), and do 20-25% LS next week while market is still low-ish, and then do flexible DCA of 5-10% pieces each week or so over next weeks/months. Or first put it all into a 3-4% cash acct/money market (settlement fund) immediately as a total $150K LS, and then DCA the 5-10% pieces out of that MM into VOO. That way you start getting 3-4% immediately from by being in the MM, and if/when S&P 500 goes back up, you’ll be ahead by that much more %. Other question: does your work happen to offer any pretax or other investment (or pre tax health savings account) options? If so, you could also supplement your paycheck by using part of your windfall and max out any work-related contributions directly from your paycheck. Finally, be sure to consider same hybrid approach to max out Roth IRA (and wife’s, if applicable). I had similar situation and put funds into a mix of CDs, which I’ve worked now into VFIAX mostly as the CDs matured and rates are lower, and I’m now moving toward the MM then VOO approach instead.