Your buy-and hold S&P 500 ended 2023 up no matter when you invested.*
This was a year with no ±3% daily swings, and only a single ±2% (in January).
The VIX (volatility index) is low. No one knows what’s coming, but lfg.
*Poetic license: you might in fact be down as of 12/29 as much as 28bp vs. the prior two trading days. Assumes daily dividend reinvestment, ignores taxes, ignores intraday returns.