Stop. The Vanguard retirement funds all did this if the target is before 2060. And those are invested in index funds by professionals. OP likely had the VTINX

OP’s losses are more exagerated than just the Target Date fund experiencing a dip from bond exposure.

Here’s OP’s same initial investment on the same day but 100% in VTINX:

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So instead of a $4k loss that OP showed, it would been a $71 loss. OP went picking individual stocks and got burned (assuming they liquidated their position after seeing their portfolio balance).