Corporate Bond Portfolio

Lipper Fund Awards: The Thomson Reuters Lipper Fund Awards, granted annually, highlight funds and fund companies that have excelled in delivering consistently strong risk-adjusted performance relative to their peers. The Lipper Fund Awards are based on the Lipper Leader for Consistent Return rating, which is a risk-adjusted performance measure calculated over 36, 60 and 120 months. The fund with the highest Lipper Leader for Consistent Return (Effective Return) value in each eligible classification wins the Lipper Fund Award. For more information, see www.lipperfundawards.com. Although Lipper makes reasonable efforts to ensure the accuracy and reliability of the data contained herein, the accuracy is not guaranteed by Lipper. Source: Lipper Inc. Other share classes may have different performance and expense characteristics. Lipper awards are not intended to predict future results and the accuracy of their information is not guaranteed

During calendar years 2016 and 2017, the MSIFT Corporate Bond Portfolio received monies related to certain nonrecurring litigation settlements. If these monies were not received, any period returns which include these settlement monies would have been lower. For example, the 2017 calendar year returns for Class I shares were positively impacted by approximately 0.89% and the 2016 calendar year returns by approximately 8.80%. The returns on the other Share Classes would also have been similarly impacted. These were one-time settlements, and as a result, the impact on the net asset value and consequently the performance will not likely be repeated in the future. Rankings for the fund were more favorable due to these settlements and ratings may also have been positively impacted. Please call the toll free number for additional information.

Class A shares include maximum front-end sales charge of 5.50% (Alternatives), 5.25% (Equity) and 4.25% (Fixed Income). Class B shares include deferred sales charge of 5.00% which declines to zero after sixth year. Class C shares include deferred sales charge of 1.00% which declines to zero after first year. Class L shares, Class I, and Class IS shares are not subject to a sales charge. Returns are net of fees and assume the reinvestment of all dividends and income. Returns for less than one year are cumulative (not annualized). Performance of other share classes will vary.

Where the net expense ratio is lower than the gross expense ratio, certain fees have been waived and/ or expenses reimbursed. These waivers and/or reimbursements will continue for at least one year from the date of the applicable fund’s current prospectus (unless otherwise noted in the applicable prospectus) or until such time as the fund's Board of Trustees acts to discontinue all or a portion of such waivers and/or reimbursements. Absent such waivers and/or reimbursements, returns would have been lower. Expenses are based on the fund's current prospectus. The minimum initial investment is $5,000,000 for Class I shares.

Growth of Investment illustration is based on an initial investment of $10,000 made since fund inception, assumes reinvestment of dividends and capital gains, but does not include sales charges and fees. Performance would have been lower if sales charges and fees had been included. Results are hypothetical.

Subject to change daily. Fund information, Portfolio Composition and Characteristics are provided for informational purposes only, and should not be deemed as a recommendation to buy or sell any security or securities in the sectors presented.

Returns are net of fees and assume the reinvestment of all dividends and income. Returns for less than one year are cumulative (not annualized). Performance of other share classes will vary.

Please keep in mind that double-digit returns are highly unusual and cannot be sustained. Investors should also be aware that these returns were primarily achieved during favorable market conditions.

PORTFOLIO CHARACTERISTICS DEFINITIONS
Duration is a measure of the sensitivity of the price (the value of principal) of a fixed-income investment to a change in interest rates. Duration is expressed as a number of years. Rising interest rates mean falling bond prices, while declining interest rates mean rising bond prices. SEC yieldis a measure of the income generated by the portfolio's underlying asset over the trailing 30 days, relative to the asset base of the portfolio itself. The SEC 30-Day yield - Subsidized (Sub.) reflects current fee waivers in effect. Absent such fee waivers, the yield would have been lower. The SEC 30-Day yield- Unsubsidized (Unsub.) does not reflect the fee waivers currently in effect. Quality distributionrefers to the rating given by a Nationally Recognized Statistical Rating Organization (“NRSRO”) and is the rating firms’ subjective opinion concerning the ability and willingness of an issuer to meet its financial obligations in full and on time. Ratings apply only to portfolio holdings and do not remove the Fund’s market risk. Quality distribution data for securities is sourced from Fitch, Moody’s and S&P. Where the credit ratings for individual securities differ between the three ratings agencies, the ‘highest’ rating is applied. The rating of credit default swaps is based on the ‘highest’ rating of the underlying reference bond. ‘Cash’ includes investments in short term instruments, including investments in Morgan Stanley liquidity funds.

Turnover is sourced from the fund's current prospectus.

RISK/RETURN DEFINITIONS
Alpha is the excess return or value added (positive or negative) of the portfolio’s return relative to the return of the benchmark. Beta is a measure of the relative volatility of a security or portfolio to the market's upward or downward movements. A beta greater than 1.0 identifies an issue or fund that will move more than the market, while a beta less than 1.0 identifies an issue or fund that will move less than the market. The Beta of the Market is always equal to 1.Information ratio is the portfolio’s alpha or excess return per unit of risk, as measured by tracking error, versus the portfolio’s benchmark.R squared measures how well an investment’s returns correlate to an index. An R squared of 100 means the portfolio performance is 100% correlated to the index’s, whereas a low r-squared means that the portfolio performance is less correlated to the index’s. Sharpe ratio is a risk-adjusted measure calculated as the ratio of excess return to standard deviation. The Sharpe ratio determines reward per unit of risk. The higher the Sharpe ratio, the better the historical risk-adjusted performance. Standard deviationmeasures how widely individual performance returns, within a performance series, are dispersed from the average or mean value.

RISK CONSIDERATIONS
There is no assurance that a Portfolio will achieve its investment objective. Portfolios are subject to market risk, which is the possibility that the market values of securities owned by the Portfolio will decline and that the value of Portfolio shares may therefore be less than what you paid for them. Accordingly, you can lose money investing in this Portfolio. Please be aware that this Portfolio may be subject to certain additional risks. Fixed-income securities are subject to the ability of an issuer to make timely principal and interest payments (credit risk), changes in interest rates (interest-rate risk), the creditworthiness of the issuer and general market liquidity (market risk). In the current rising interest-rate environment, bond prices may fall and may result in periods of volatility and increased portfolio redemptions. Longer-term securities may be more sensitive to interest rate changes. In a declining interest-rate environment, the portfolio may generate less income. Derivative instruments may disproportionately increase losses and have a significant impact on performance. They also may be subject to counterparty, liquidity, valuation, correlation and market risks.Restricted and illiquid securities may be more difficult to sell and value than publicly traded securities (liquidity risk).

Morningstar
Rankings: The percentile rankings are based on the average annual total returns for the periods stated and do not include any sales charges, but do include reinvestment of dividends and capital gains and Rule 12b-1 fees. The highest (or most favorable) percentile rank is 1 and the lowest (or least favorable) percentile rank is 100. The top-performing fund in a category will always receive a rank of 1.

Ratings: The Morningstar Rating™ for funds, or "star rating", is calculated for managed products (including mutual funds, variable annuity and variable life subaccounts, exchange-traded funds, closed-end funds, and separate accounts) with at least a three-year history. Exchange-traded funds and open-ended mutual funds are considered a single population for comparative purposes. It is calculated based on a Morningstar Risk-Adjusted Return measure that accounts for variation in a managed product's monthly excess performance, placing more emphasis on downward variations and rewarding consistent performance. The top 10% of products in each product category receive 5 stars, the next 22.5% receive 4 stars, the next 35% receive 3 stars, the next 22.5% receive 2 stars, and the bottom 10% receive 1 star. The Overall Morningstar Rating for a managed product is derived from a weighted average of the performance figures associated with its three-, five-, and 10-year (if applicable) Morningstar Rating metrics. The weights are: 100% three-year rating for 36-59 months of total returns, 60% five-year rating/40% three-year rating for 60-119 months of total returns, and 50% 10-year rating/30% five-year rating/20% three-year rating for 120 or more months of total returns. While the 10-year overall star rating formula seems to give the most weight to the 10-year period, the most recent three-year period actually has the greatest impact because it is included in all three rating periods. Ratings do not take into account sales loads.

© 2017 Morningstar. All Rights Reserved. The information contained herein: (1) is proprietary to Morningstar and/or its content providers; (2) may not be copied or distributed; and (3) is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information. Past performance is no guarantee of future results.

OTHER CONSIDERATIONS
The Bloomberg Barclays U.S. Corporate Index is a broad-based benchmark that measures the investment grade, fixed-rate, taxable, corporate bond market. The index is unmanaged and does not include any expenses, fees or sales charges. It is not possible to invest directly in an index.

Please consider the investment objective, risks, charges and expenses of the fund carefully before investing. The prospectus contains this and other information about the fund. To obtain a prospectus, download one at morganstanley.com/im or call 1-800-548-7786. Please read the prospectus carefully before investing.

As of January 1, 2011, the SEC requires fund companies to file a new exhibit with risk/return summary information in interactive data (XBRL) format. Click here for XBRL files.

Morgan Stanley Investment Management (MSIM) is the asset management division of Morgan Stanley