Label

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Value

Risk/Return:

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Registrant Name

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VANGUARD VARIABLE INSURANCE FUNDS

Prospectus Date

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Apr. 29, 2016

Supplement [Text Block]

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[SHIP LOGO VANGUARD (R)]

Vanguard Variable Insurance Fund Allocation Portfolios

Supplement to the Prospectus and Summary Prospectus Dated April 29, 2016

Important Changes to Vanguard Variable Insurance Fund Conservative Allocation Portfolio and Moderate Allocation Portfolio

The board of trustees of Vanguard Variable Insurance Fund has approved an increase in the international equity and international fixed income exposure of the Conservative Allocation Portfolio and the Moderate Allocation Portfolio. These changes will not affect the Portfolios’ overall allocations to stocks and bonds. The Portfolios are expected to implement these changes in the coming months.

The Portfolios’ target allocations will change as shown below:

Conservative Allocation Portfolio
Current Allocation		New Allocation
U.S. fixed income securities	48%	U.S. fixed income securities	42%
Large-cap U.S. stocks	22%	Large-cap U.S. stocks	19%
Foreign stocks	12%	Foreign stocks	16%
Foreign fixed income securities	12%	Foreign fixed income securities	18%
Small- and mid-cap U.S. stocks	6%	Small- and mid-cap U.S. stocks	5%
Moderate Allocation Portfolio
Current Allocation		New Allocation
Large-cap U.S. stocks	34%	Large-cap U.S. stocks	29%
U.S. fixed income securities	32%	U.S. fixed income securities	28%
Foreign stocks	18%	Foreign stocks	24%
Foreign fixed income securities	8%	Foreign fixed income securities	12%
Small- and mid-cap U.S. stocks	8%	Small- and mid-cap U.S. stocks	7%

The Portfolios’ expense ratios are not expected to increase as a result of these changes.

© 2017 The Vanguard Group, Inc. All rights reserved.

Vanguard Marketing Corporation, Distributor.

PS 710 032017

Conservative Allocation Portfolio

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

vvif_SupplementTextBlock

[SHIP LOGO VANGUARD (R)]

Vanguard Variable Insurance Fund Allocation Portfolios

Supplement to the Prospectus and Summary Prospectus Dated April 29, 2016

Important Changes to Vanguard Variable Insurance Fund Conservative Allocation Portfolio and Moderate Allocation Portfolio

The board of trustees of Vanguard Variable Insurance Fund has approved an increase in the international equity and international fixed income exposure of the Conservative Allocation Portfolio and the Moderate Allocation Portfolio. These changes will not affect the Portfolios’ overall allocations to stocks and bonds. The Portfolios are expected to implement these changes in the coming months.

The Portfolios’ target allocations will change as shown below:

Conservative Allocation Portfolio
Current Allocation		New Allocation
U.S. fixed income securities	48%	U.S. fixed income securities	42%
Large-cap U.S. stocks	22%	Large-cap U.S. stocks	19%
Foreign stocks	12%	Foreign stocks	16%
Foreign fixed income securities	12%	Foreign fixed income securities	18%
Small- and mid-cap U.S. stocks	6%	Small- and mid-cap U.S. stocks	5%

The Portfolios’ expense ratios are not expected to increase as a result of these changes.

© 2017 The Vanguard Group, Inc. All rights reserved.

Vanguard Marketing Corporation, Distributor.

PS 710 032017

Moderate Allocation Portfolio

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

vvif_SupplementTextBlock

[SHIP LOGO VANGUARD (R)]

Vanguard Variable Insurance Fund Allocation Portfolios

Supplement to the Prospectus and Summary Prospectus Dated April 29, 2016

Important Changes to Vanguard Variable Insurance Fund Conservative Allocation Portfolio and Moderate Allocation Portfolio

The board of trustees of Vanguard Variable Insurance Fund has approved an increase in the international equity and international fixed income exposure of the Conservative Allocation Portfolio and the Moderate Allocation Portfolio. These changes will not affect the Portfolios’ overall allocations to stocks and bonds. The Portfolios are expected to implement these changes in the coming months.

The Portfolios’ target allocations will change as shown below:

Moderate Allocation Portfolio
Current Allocation		New Allocation
Large-cap U.S. stocks	34%	Large-cap U.S. stocks	29%
U.S. fixed income securities	32%	U.S. fixed income securities	28%
Foreign stocks	18%	Foreign stocks	24%
Foreign fixed income securities	8%	Foreign fixed income securities	12%
Small- and mid-cap U.S. stocks	8%	Small- and mid-cap U.S. stocks	7%

The Portfolios’ expense ratios are not expected to increase as a result of these changes.

© 2017 The Vanguard Group, Inc. All rights reserved.

Vanguard Marketing Corporation, Distributor.

PS 710 032017