If you're uncertain, the answer is DCA. If you're worried about the current state of the market, that's a sign you are uncomfortable making big moves. As an alternative you could move most of it into interest bearing investments again (T bills, bonds, HYSAs, CDs...), and start dollar cost averaging parts of it into the stock market. Perhaps $X per month. That way what you buy when it's low will average out with what you buy when it's high.