## # A tibble: 264 × 3
## asset date returns
## <chr> <date> <dbl>
## 1 QQQ 2012-03-30 0.173
## 2 QQQ 2012-06-29 -0.0492
## 3 QQQ 2012-09-28 0.0693
## 4 QQQ 2012-12-31 -0.0459
## 5 QQQ 2013-03-28 0.0596
## 6 QQQ 2013-06-28 0.0360
## 7 QQQ 2013-09-30 0.104
## 8 QQQ 2013-12-31 0.112
## 9 QQQ 2014-03-31 0.00312
## 10 QQQ 2014-06-30 0.0714
## # … with 254 more rows
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