B-1 STATEMENT OF ADDITIONAL INFORMATION Dated May 1 ...

These opinions are based on the experience of these individuals in the securities industry and informationavailable to them about the level of commissions being paid by other institutional investors.Some securities considered for investment by the Fund’s Portfolios may also be appropriate forother clients served by the investment adviser or sub-adviser. If a purchase or sale of securities consistentwith the investment policies of a Portfolio and one or more of these clients served by the investmentadviser or sub-adviser is considered at or about the same time, transactions in such securities will beallocated among the Portfolios and clients in a manner believed to be fair and reasonable by theinvestment adviser or sub-adviser. In some cases this procedure could have a detrimental effect on theprice or volume of the security so far as a Portfolio is concerned. In other cases it is possible that theability to participate in volume transactions may improve execution and reduce transaction costs to aPortfolio.As permitted by Section 28(e) of the Securities Exchange Act of 1934, the investment adviser orsub-adviser may cause a Portfolio it advises to pay certain brokers-dealers more than the lowestcommission rate in order to receive services that relate to the execution of securities transactions(“Brokerage Services”) and advice, analyses or reports within the meaning of Section 28(e) (“ResearchServices”), if the investment adviser or sub-adviser determines in good faith that the amount paid isreasonable in relation to the value of the Brokerage and Research Services it receives. This may beviewed in terms of either the particular transaction or the investment adviser or sub-adviser’s overallresponsibilities to its client accounts over which it exercises investment discretion. Consistent with thispractice, the investment adviser or sub-adviser may receive Research Services from many broker-dealerswith which the investment adviser or sub-adviser places portfolio transactions. Research provided can beeither proprietary (created and provided by the broker-dealer, including tangible research products as wellas access to analysts and traders) or third-party (created by a third party but provided by the brokerdealer).These services, which in some cases may also be purchased for cash, include supplyinginformation about particular companies, markets, or countries, statistical data, quotations and othersecurities pricing information, evaluations of securities, recommendations as to the purchase or sale ofsecurities and other information that provides lawful and appropriate assistance to the manager in theperformance of its investment decision-making responsibilities. Although these services may be of valueto the investment adviser or sub-adviser in advising its various clients (including the Portfolios), not all ofthese services are necessarily useful and of value in managing a Portfolio.Mason Street Advisors may enter into Client Commission Arrangements with certain broker-dealersunder which Mason Street Advisors may use client commissions to pay for Research Services producedby an entity other than the executing broker-dealer, including third party broker-dealers and non-brokerresearch providers. Under such arrangements, the executing broker sets aside a portion of thecommission paid for the purpose of providing Mason Street Advisors with certain services that areeligible under Section 28(e).During the years ended December 31, 2006, 2007 and 2008, each Portfolio paid the followingbrokerage commissions on agency transactions:Name of Portfolio 2008 2007 2006Growth Stock Portfolio $ 457,176 $ 514,147 $ 631,594Focused Appreciation Portfolio 193,320 127,285 90,139Large Cap Core Stock Portfolio 437,899 421,547 498,069Index 500 Stock Portfolio 130,524 81,447 142,618Domestic Equity Portfolio 437,747 332,958 258,130Equity Income Portfolio 80,508 94,025 51,629Mid Cap Growth Stock Portfolio 1,011,685 1,783,080 2,128,510Index 400 Stock Portfolio 49,030 67,925 39,106Mid Cap Value Portfolio 107,426 80,465 72,632Small Cap Growth Stock Portfolio 1,559,127 2,395,168 1,820,124Small Cap Value Portfolio 165,095 242,558 165,667B-55