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Bond & Mortgage Securities Account (Prospectus Summary) | Bond & Mortgage Securities Account
Bond & Mortgage Securities Account
Objective:
The Account seeks to provide current income.
Fees and Expenses of the Account
This table describes the fees and expenses that you may pay if you buy and hold
shares of the Account. These fees and expenses do not reflect the fees and
expenses of any variable insurance contract that may invest in the Account and
would be higher if they did.
Annual Account Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses
Bond & Mortgage Securities Account
Class 1
Management Fees 0.44%
Other Expenses 0.01%
Total Annual Account Operating Expenses 0.45%
Example
This Example is intended to help you compare the cost of investing in the
Account with the cost of investing in other mutual funds.

The Example assumes that you invest $10,000 in the Account for the time periods
indicated and then redeem all of your shares at the end of those periods. The
Example also assumes that your investment has a 5% return each year and that the
Account's operating expenses remain the same. If separate account expenses and
contract level expenses were included, expenses would be higher. Although your
actual costs may be higher or lower, based on these assumptions your costs would
be:
Expense Example (USD $)
Expense Example, With Redemption, 1 Year
Expense Example, With Redemption, 3 Years
Expense Example, With Redemption, 5 Years
Expense Example, With Redemption, 10 Years
Bond & Mortgage Securities Account Class 1
46 144 252 567
Portfolio Turnover
The Account pays transaction costs, such as commissions, when it buys and sells
securities (or "turns over" its portfolio). A higher portfolio turnover rate may
indicate higher transaction costs. These costs, which are not reflected in
annual Account operating expenses or in the example, affect the Account's
performance. During the most recent fiscal year, the Account's portfolio
turnover rate was 252.1% of the average value of its portfolio.
Principal Investment Strategies
Under normal circumstances, the Account invests at least 80% of its net assets
in intermediate maturity fixed-income or debt securities rated BBB- or higher by
Standard & Poor's Rating Service ("S&P") or Baa3 or higher by Moody's Investors
Service, Inc. ("Moody's") at the time of purchase, including securities issued
or guaranteed by the U.S. government or its agencies or instrumentalities;
asset-backed securities or mortgage-backed securities representing an interest
in a pool of mortgage loans or other assets; debt securities and taxable
municipal bonds; and debt securities issued or guaranteed by foreign governments
payable in U.S. dollars. The Account may also invest in foreign securities, and
up to 20% of its assets in non-investment grade securities ("junk bonds) which
are securities rated BB+ or lower by S&P or Ba1 or lower by Moody's at the time
of purchase. Under normal circumstances, the Account maintains an average
portfolio duration that is within ±15% or ±0.75 year (whichever is greater) of
the duration of the Barclays Capital Aggregate Bond Index, which as of December
31, 2011 was 4.9 years.

The Account may actively trade securities and enter into dollar roll
transactions which may involve leverage. The Account may utilize derivative
strategies. Specifically, the Account may invest in Treasury futures or interest
rate swaps to manage the fixed-income exposure and credit default swaps to
increase or decrease, in an efficient manner, exposures to certain sectors or
individual issuers. The Account may use forwards to manage its foreign currency
exposure.

During the fiscal year ended December 31, 2011, the average ratings of the
Account's fixed-income assets, based on market value at each month-end, were as
follows (all ratings are by Moody's):

50.60% in securities rated Aaa  7.12% in securities rated Ba   0.02% in securities rated C
5.22% in securities rated Aa    5.81% in securities rated B    0.00% in securities rated D
11.62% in securities rated A    2.09% in securities rated Caa  1.39% in securities not rated
16.12% in securities rated Baa  0.01% in securities rated Ca
Principal Risks
The Account may be an appropriate investment for investors seeking
diversification by investing in a fixed-income mutual fund.

The value of your investment in the Account changes with the value of the
Account's investments. Many factors affect that value, and it is possible to
lose money by investing in the Account. An investment in the Account is not a
deposit of a bank and is not insured or guaranteed by the Federal Deposit
Insurance Corporation or any other government agency. The principal risks of
investing in the Account, in alphabetical order, are:

Active Trading Risk. Actively trading portfolio securities may accelerate
realization of taxable gains and losses, lower fund performance and may result
in high portfolio turnover rates and increased brokerage costs

Counterparty Risk. Counterparty risk is the risk that the counterparty to a
derivatives contract or repurchase agreement, the borrower of a portfolio's
securities, or other obligation, will be unable or unwilling to make timely
principal, interest, or settlement payments, or otherwise to honor its
obligations.

Currency Risk.  Risks of investing in securities denominated in, or that trade
in, foreign (non-U.S.) currencies include changes in foreign exchange rates and
foreign exchange restrictions.

Derivatives Risk. Transactions in derivatives (such as options, futures,
currency contracts, and swaps) may increase volatility, cause the liquidation of
portfolio positions when not advantageous to do so and produce disproportionate
losses.

Fixed-Income Securities Risk. Fixed-income securities are subject to interest
rate risk and credit quality risk. The market value of fixed-income securities
generally declines when interest rates rise, and an issuer of fixed-income
securities could default on its payment obligations.

Foreign Securities Risk. The risks of foreign securities include loss of value
as a result of: political or economic instability; nationalization,
expropriation or confiscatory taxation; settlement delays; and limited
government regulation (including less stringent reporting, accounting, and
disclosure standards than are required of U.S. companies).

High Yield Securities Risk. High yield fixed-income securities (commonly
referred to as "junk bonds") are subject to greater credit quality risk than
higher rated fixed-income securities and should be considered speculative.

Leverage Risk. Leverage created by borrowing or certain types of transactions or
investments, such as reverse repurchase agreements, loans of portfolio
securities, and the use of when-issued, delayed delivery or forward commitment
transactions, or derivative instruments, may impair the fund's liquidity, cause
it to liquidate positions at an unfavorable time, increase volatility of the
fund's net asset value, or diminish the fund's performance.

Municipal Securities Risk. Principal and interest payments on municipal
securities may not be guaranteed by the issuing body and may be payable only
from a particular source. That source may not perform as expected and payment
obligations may not be made or made on time.

Portfolio Duration Risk. Portfolio duration is a measure of the expected life of
a fixed-income security and its sensitivity to changes in interest rates. The
longer a fund's average portfolio duration, the more sensitive the fund will be
to changes in interest rates.

Prepayment Risk. Unscheduled prepayments on mortgage-backed and asset-backed
securities may have to be reinvested at lower rates. A reduction in prepayments
may increase the effective maturities of these securities, exposing them to the
risk of decline in market value over time (extension risk).

Real Estate Securities Risk. Real estate securities are subject to the risks
associated with direct ownership of real estate, including declines in value,
adverse economic conditions, increases in expenses, regulatory changes and
environmental problems.

Risk of Being an Underlying Fund. An underlying fund of a fund of funds may
experience relatively large redemptions or investments as the fund of funds
periodically reallocates or rebalances its assets. These transactions may cause
the underlying fund to sell portfolio securities to meet such redemptions, or to
invest cash from such investments, at times it would not otherwise do so, and
may as a result increase transaction costs and adversely affect underlying fund
performance.
  
U.S. Government Securities Risk. Yields available from U.S. government
securities are generally lower than yields from many other fixed-income
securities.

U.S. Government Sponsored Securities Risk. Securities issued by U.S.
government-sponsored or -chartered enterprises such as the Federal Home Loan
Mortgage Corporation, the Federal National Mortgage Association, and the Federal
Home Loan Banks are not issued or guaranteed by the U.S. Treasury.
Performance
The following information provides some indication of the risks of investing in
the Account by showing changes in the Account's performance from year to year
and by showing how the Account's average annual returns for 1, 5, and 10 years
(or, if shorter, the life of the Account) compare with those of one or more
broad measures of market performance. Past performance is not necessarily an
indication of how the Account will perform in the future. Performance figures
for the Accounts do not include any separate account expenses, cost of
insurance, or other contract-level expenses; total returns for the Accounts
would be lower if such expenses were included.
Calendar Year Total Returns (%) as of 12/31 each year (Class 1 Shares)
Bar Chart
Highest return for a quarter during the period of the bar              
chart above:                                                    Q3 '09     9.32%
Lowest return for a quarter during the period of the bar               
chart above:                                                    Q4 '08    -8.24%
Average Annual Total Returns (%) For the periods ended December 31, 2011
Average Annual Total Returns Bond & Mortgage Securities Account
Average Annual Returns, Label
Average Annual Returns, 1 Year
Average Annual Returns, 5 Years
Average Annual Returns, 10 Years
Class 1
Bond & Mortgage Securities Account - Class 1 7.07% 4.39% 4.78%
Barclays Capital Aggregate Bond Index
Barclays Capital Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes) 7.84% 6.50% 5.78%