Almost a year ago, I opened 529s for my two sons, and started them off with a sizeable lump sum. I have not contributed any money since. Thanks to a nice holiday bonus, I was planning to add another large lump sum but when I checked the accounts, the total balance was lower than the opening balance (about 4% lower).
Do I add funds now, to benefit from any upswing? Or hold off?
Thanks in advance.