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Mutual fund value went down, shares went up, no action taken by me
You did something that you shouldn't have done; you bought a dividend.  Most mutual fund companies have educational materials on their sites that recommend against making new investments in mutual funds in the last two months of the year because most mutual funds distribute their earnings (dividends, capital gains etc) to their shareholders in December, and the share price of the funds goes down in the amount of the per share distribution. These distributions can be taken  in cash or can be re-invested in the fund; you most likely chose the latter  option (it is often the default choice if you ignored all this because you are a newbie). For those who choose to reinvest, the number of shares in the mutual fund increases, but since the price of the shares has decreased, the net amount remains the same. You own more shares at a lower price than the day before when the price was higher but the total value of your account is the same (ignoring normal market fluctuations in the price of the actual stocks held by the fund. Regardless of whether you take the distributions as cash or re-invest in the fund, that money is taxable income to you (unless the fund is owned inside a 401k or IRA or other tax-deferred investment program).  You bought 56 shares at a price of $17.857 per share (net cost $1000). The fund distributed its earnings shortly thereafter and gave you 71.333-56= 15.333 additional shares. The new share price is $14.11. So, the total value of your investment is $1012, but the amount that you have invested in the account is the original $1000 plus the amount of the distribution which is (roughly) $14.11 x 15.333 = $216.  Your total investment of $1216 is now worth $1012 only, and so you have actually lost money. Besides, you owe income tax on that $216 dividend that you received.  Do you see why the mutual fund companies recommend against making new investments late in the year?  If you had waited till after the mutual fund had made its distribution, you could have bought $1000/14.11 = 70.871 shares and wouldn't have owed tax on that distribution that you just bought by making the investment just before the distribution was made. See also my answer to this recent question about investing in mutual funds.