Being America, where you can sue for anything, Vanguard is getting sued to their management that allowed this bad tax outcome to happen to people like OP. Below from Matt Levine’s column
https://www.bloomberg.com/opinion/articles/2022-03-21/everyone-wants-to-do-esg-now
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Generally speaking [mutual fund capital gain distributions] is a small constant drag: You invest in a mutual fund with lots of other people, and every year some of them withdraw their money (to pay for retirement or to buy different mutual funds or whatever), and you have to pay some taxes on some of your gains. But if you invest in a mutual fund with 1,000 other people, and they all decide to withdraw from the mutual fund at the same time, then the mutual fund will have to sell almost all of its stocks, which means that you will have to pay taxes on almost all of your unrealized gains in the fund all at once, and you will be annoyed.
Here’s a weird lawsuit against the Vanguard Group:
Vanguard offers “set-it-and-forget-it” target date retirement funds. These funds are organized as a trust and managed by the same trustees. The investment strategy is based on a target retirement year, such as 2030 or 2050. Vanguard offers two tiers of target date funds: (1) funds for individuals and retirement plans with less than $100M (the “Retail Funds”); and (2) funds for retirement plans with over $100M (the “Institutional Funds”). The strategy and investments are the same, but the Institutional Funds charge lower management fees. ….
Normally, target date funds don’t sell many assets, so capital gains distributions are minimal. But beginning in December of 2020, Vanguard itself caused an “elephant stampede” sell off from its Retail Funds. Vanguard chose to open its Institutional Funds (which hold the same assets as the Retail Funds) to all retirement plans with at least $5M, so that retirement plans invested in the Retail Funds could sell their shares and move over to cheaper, but otherwise identical, Institutional Funds. And this is what happened.
To raise cash to redeem so many shares, the Retail Funds were forced to sell off as much as 15% of their assets (or even more). When these assets were sold, the Retail Funds recognized capital gains on the assets. The resulting capital gains distributions to investors were unprecedented (40 times previous levels). While this didn’t hurt retirement plans, it left taxable investors holding the tax bag.
Vanguard had other, readily-available ways to lower costs for retirement plans without hurting its taxable investors. But it either did not even consider these options, or did not care about hurting its smaller, taxable investors. This was a gross violation of Vanguard’s fiduciary duties (among other legal duties).
Much of the money in this fund was in corporate 401(k)s, which don’t care about incurring taxes. Some of it was in individual taxable accounts, which do care, and which did incur taxes when the corporate 401(k)s sold. Is that a reason to sue Vanguard? I don’t know.
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