I have not touched this account almost 2 years with dividends being reinvested. Why wouldn't it be tracking VTSAX?
My Vanguard account is saying the 1 yr performance ending 12/31 is 12.5%.
VTSAX on stock on any stock app/site says 15.91%.
[Vanguards VTSAX page says 17.21%.](https://investor.vanguard.com/investment-products/mutual-funds/profile/vtsax#performance-fees) Which I assume includes dividends.
Can someone explain this to me? Why wouldn't my performance match what is on Vanguards page?