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Does a bond etf drop by the amount of the dividend just like an equity etf
No, they do not. Stock funds and bonds funds collect income dividends in different   ways. Stock funds collect dividends  (as well as any capital gains   that are realized) from the underlying stocks  and incorporates these   into the funds’ net asset value, or daily share price. That’s why a   stock fund’s share price drops when the fund makes a distribution –   the distribution comes out of the fund’s total net assets. With bond funds, the internal accounting is different:  Dividends   accrue daily, and are then paid out to shareholders every month or   quarter.  Bond funds collect the income from the underlying bonds and   keep it in a separate internal “bucket.”  A bond fund calculates a   daily accrual rate for the shares outstanding, and shareholders only   earn income for the days they actually hold the fund.  For example, if   you buy a bond fund two days before the fund’s month-end distribution,   you would only receive two days’ worth of income that month.  On the   other hand, if you sell a fund part-way through the month, you will   still receive a partial distribution at the end of the month,   pro-rated for the days you actually held the fund. Source  Also via bogleheads: Most Vanguard bond funds accrue interest to the share holders daily.   Here is a typical statement from a prospectus: Each Fund distributes to shareholders virtually all of its net income   (interest less expenses) as well as any net capital gains realized   from the sale of its holdings. The Fund’s income dividends accrue   daily and are distributed monthly. The term accrue used in this sense   means that the income dividends are credited to your account each day,   just like interest in a savings account that accrues daily. Since the   money set aside for your dividends is both an asset of the fund and a   liability, it does not affect the calculated net asset value. When the   fund distributes the income dividends at the end of the month, the net   asset value does not change as both the assets and liabilities   decrease by exactly the same amount. [Note that if you sell all of   your bond fund shares in the middle of the month, you will receive as   proceeds the value of your shares (calculated as number of shares   times net asset value) plus a separate distribution of the accrued   income dividends.]