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Vanguard Institutional Index Fund Institutional (VIIIX)

[[ item.lastPrice ]] [[ item.priceChange ]] ([[ item.percentChange ]]) [[ item.tradeTime ]] [FUND]
[[ rootItem.symbol ]]underlying price [[ rootItem.lastPrice ]] [[ rootItem.priceChange ]] ([[ rootItem.percentChange ]]) [[ rootItem.tradeTime ]]
Performance Report for [[ item.sessionDateDisplayLong ]]
[[ chartTitle ]]

Price Performance

Price History
Period Period Low Period High Performance
5-Day
552.37 unch
on 02/23/26
558.15 -1.04%
on 02/20/26
+0.33 (+0.06%)
since 02/13/26
1-Month
548.75 +0.66%
on 02/05/26
563.21 -1.92%
on 01/27/26
-5.75 (-1.03%)
since 01/23/26
3-Month
540.06 +2.28%
on 11/24/25
563.21 -1.92%
on 01/27/26
+20.55 (+3.86%)
since 11/21/25
6-Month
515.39 +7.18%
on 09/02/25
563.21 -1.92%
on 01/27/26
+33.07 (+6.37%)
since 08/22/25
YTD
548.48 +0.71%
on 01/20/26
563.21 -1.92%
on 01/27/26
+0.30 (+0.05%)
since 12/31/25
52-Week
398.21 +38.71%
on 04/08/25
563.21 -1.92%
on 01/27/26
+72.65 (+15.14%)
since 02/21/25
2-Year
391.95 +40.93%
on 04/19/24
563.21 -1.92%
on 01/27/26
+151.66 (+37.85%)
since 02/23/24
3-Year
299.02 +84.73%
on 03/13/23
563.21 -1.92%
on 01/26/26
+238.65 (+76.07%)
since 02/27/23
5-Year
275.51 +100.49%
on 10/10/22
563.21 -1.92%
on 01/26/26
+263.32 (+91.10%)
since 03/01/21
10-Year
138.32 +299.35%
on 03/01/16
563.21 -1.92%
on 01/01/26
+417.28 (+308.88%)
since 02/01/16
20-Year
41.13 +1,243.14%
on 03/01/09
563.21 -1.92%
on 01/01/26
+479.52 (+658.28%)
since 02/01/06

52-Week Key Points

52-Wk Low
398.21
52-Wk High
563.21
52-Week High 563.21
Last Price 552.37
Fibonacci 61.8% 500.18
Fibonacci 50% 480.71
Fibonacci 38.2% 461.24
52-Week Low 398.21

See More

VIIIX Daily Price Range

Day Low
552.37
Day High
552.37
Last Price: 552.37
Daily Closing Range: 0.00%
Close to Close %Change: -1.04%
Close to Open %Change: unch
High to Low %Change: unch
Open to Previous %Change: -1.04%
Gap Down Today %Change -1.04%

New Highs

Period
Made
New high
Percent
From Last
5-Day 3 times -1.04%
1-Month 2 times -1.92%
3-Month 15 times -1.92%
6-Month 28 times -1.92%
YTD 6 times -1.92%
52-Week 53 times -1.92%
2-Year 98 times -1.92%
3-Year 77 times -1.92%
5-Year 89 times -1.92%
10-Year 69 times -1.92%
20-Year 112 times -1.92%

New Lows

Period
Made
New low
Percent
From Last
5-Day 2 times unch
1-Month 5 times +0.66%
3-Month 1 time +2.28%
6-Month 2 times +7.18%
YTD 2 times +0.71%
52-Week 13 times +38.71%
2-Year 5 times +40.93%
3-Year 2 times +84.73%
5-Year 4 times +100.49%
10-Year 1 time +299.35%
20-Year 8 times +1,243.14%
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