N-CSRS 1 main.htm

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811-3737

Fidelity Advisor Series IV
(Exact name of registrant as specified in charter)

82 Devonshire St., Boston, Massachusetts 02109
(Address of principal executive offices) (Zip code)

Eric D. Roiter, Secretary

82 Devonshire St.

Boston, Massachusetts 02109
(Name and address of agent for service)

Registrant's telephone number, including area code: 617-563-7000

Date of fiscal year end:

November 30

Date of reporting period:

May 31, 2007

Item 1. Reports to Stockholders

Fidelity ®
Institutional
Short-Intermediate
Government Fund

Semiannual Report

May 31, 2007

(2_fidelity_logos) (Registered_Trademark)

Contents

Chairman's Message

<Click Here>

Ned Johnson's message to shareholders.

Shareholder Expense Example

<Click Here>

An example of shareholder expenses.

Investment Changes

<Click Here>

A summary of major shifts in the fund's investments over the past six months.

Investments

<Click Here>

A complete list of the fund's investments with their market values.

Financial Statements

<Click Here>

Statements of assets and liabilities, operations, and changes in net assets,
as well as financial highlights.

Notes

<Click Here>

Notes to the financial statements.

To view a fund's proxy voting guidelines and proxy voting record for the 12-month period ended June 30, visit http://www.fidelity.com (search for "proxy voting guidelines") or visit the Securities and Exchange Commission's (SEC) website at http://www.sec.gov. You may also call 1-800-544-8544 to request a free copy of the proxy voting guidelines.

Standard & Poor's, S&P and S&P 500 are registered service marks of The McGraw-Hill Companies, Inc. and have been licensed for use by Fidelity Distributors Corporation.

Other third party marks appearing herein are the property of their respective owners.

All other marks appearing herein are registered or unregistered trademarks or service marks of FMR Corp. or an affiliated company.

This report and the financial statements contained herein are submitted for the general information of the shareholders of the fund. This report is not authorized for distribution to prospective investors in the fund unless preceded or accompanied by an effective prospectus.

A fund files its complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-Q. Forms N-Q are available on the SEC's web site at http://www.sec.gov. A fund's Forms N-Q may be reviewed and copied at the SEC's Public Reference Room in Washington, DC. Information regarding the operation of the SEC's Public Reference Room may be obtained by calling 1-800-SEC-0330. For a complete list of a fund's portfolio holdings, view the most recent holdings report, semiannual report, or annual report on Fidelity's web site at http://www.fidelity.com or http://www.advisor.fidelity.com, as applicable.

NOT FDIC INSURED · MAY LOSE VALUE · NO BANK GUARANTEE

Neither the fund nor Fidelity Distributors Corporation is a bank.

Semiannual Report

Chairman's Message

(photo_of_Edward_C_Johnson_3d)

Dear Shareholder:

Stocks are currently on pace to register their fifth-straight year of positive returns, although gains could be trimmed if the U.S. economy continues to slow. While financial markets are always unpredictable, there are a number of time-tested principles that can put the historical odds in your favor.

One of the basic tenets is to invest for the long term. Over time, riding out the markets' inevitable ups and downs has proven much more effective than selling into panic or chasing the hottest trend. Even missing only a few of the markets' best days can significantly diminish investor returns. Patience also affords the benefits of compounding - of earning interest on additional income or reinvested dividends and capital gains. There are tax advantages and cost benefits to consider as well. The more you sell, the more taxes you pay, and the more you trade, the higher the costs. While staying the course doesn't eliminate risk, it can considerably lessen the effect of short-term declines.

You can further manage your investing risk through diversification. And today, more than ever, geographic diversification should be taken into account. Studies indicate that asset allocation is the single most important determinant of a portfolio's long-term success. The right mix of stocks, bonds and cash - aligned to your particular risk tolerance and investment objective - is very important. Age-appropriate rebalancing is also an essential aspect of asset allocation. For younger investors, an emphasis on equities - which historically have been the best-performing asset class over time - is encouraged. As investors near their specific goal, such as retirement or sending a child to college, consideration may be given to replacing volatile assets (e.g. common stocks) with more-stable fixed investments (bonds or savings plans).

A third investment principle - investing regularly - can help lower the average cost of your purchases. Investing a certain amount of money each month or quarter helps ensure you won't pay for all your shares at market highs. This strategy - known as dollar cost averaging - also reduces unconstructive "emotion" from investing, helping shareholders avoid selling weak performers just prior to an upswing, or chasing a hot performer just before a correction.

We invite you to contact us via the Internet, through our Investor Centers or over the phone. It is our privilege to provide you the information you need to make the investments that are right for you.

Sincerely,

/s/Edward C. Johnson 3d

Edward C. Johnson 3d

Semiannual Report

Shareholder Expense Example

As a shareholder of the Fund, you incur two types of costs: (1) transaction costs, and (2) ongoing costs, including management fees and other Fund expenses. This Example is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds.

The Example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period (December 1, 2006 to May 31, 2007).

Actual Expenses

The first line of the accompanying table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000.00 (for example, an $8,600 account value divided by $1,000.00 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period.

Hypothetical Example for Comparison Purposes

The second line of the accompanying table provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transaction costs. Therefore, the second line of the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds.

Beginning
Account Value
December 1, 2006

Ending
Account Value
May 31, 2007

Expenses Paid
During Period
*
December 1, 2006
to May 31, 2007

Actual

$ 1,000.00

$ 1,014.10

$ 2.26

Hypothetical (5% return per year before expenses)

$ 1,000.00

$ 1,022.69

$ 2.27

* Expenses are equal to the Fund's annualized expense ratio of .45%; multiplied by the average account value over the period, multiplied by 182/365 (to reflect the one-half year period).

Semiannual Report

Investment Changes

Coupon Distribution as of May 31, 2007

% of fund's investments

% of fund's investments
6 months ago

Less than 4%

3.4

17.9

4 - 4.99%

56.1

43.2

5 - 5.99%

20.9

21.6

6 - 6.99%

14.1

9.4

7% and over

1.0

1.1

Coupon distribution shows the range of stated interest rates on the fund's investments, excluding short-term investments.

Weighted Average Maturity as of May 31, 2007

6 months ago

Years

2.9

2.8

The weighted average maturity is based on the dollar-weighted average length of time until principal payments are expected or until securities reach maturity, taking into account any maturity shortening feature such as a call, refunding or redemption provision.

Duration as of May 31, 2007

6 months ago

Years

2.2

2.1

Duration shows how much a bond fund's price fluctuates with changes in comparable interest rates. If rates rise 1%, for example, a fund with a five-year duration is likely to lose about 5% of its value. Other factors also can influence a bond fund's performance and share price. Accordingly, a bond fund's actual performance may differ from this example.

Asset Allocation (% of fund's net assets)

As of May 31, 2007 *

As of November 30, 2006 **

Mortgage
Securities 18.1%

Mortgage
Securities 10.0%

CMOs and Other Mortgage Related Securities 9.7%

CMOs and Other Mortgage Related Securities 11.8%

U.S. Treasury
Obligations 29.7%

U.S. Treasury
Obligations 36.6%

U.S. Government
Agency Obligations 44.5%

U.S. Government
Agency Obligations 39.6%

Asset-Backed
Securities 0.9%

Asset-Backed
Securities 1.0%

Short-Term
Investments and
Net Other Assets (dagger) (2.9)%

Short-Term
Investments and
Net Other Assets 1.0%

* Futures and Swaps

(1.3)%

** Futures and Swaps

0.0%

(dagger) Short-Term Investments and Net Other Assets are not included in the pie chart.

Semiannual Report

Investments May 31, 2007 (Unaudited)

Showing Percentage of Net Assets

U.S. Government and Government Agency Obligations - 74.2%

Principal Amount

Value

U.S. Government Agency Obligations - 44.5%

Fannie Mae:

4.125% 5/15/10

$ 5,520,000

$ 5,365,241

4.5% 10/15/08

2,517,000

2,491,445

4.625% 1/15/08

44,300,000

44,111,503

4.75% 12/15/10

22,900,000

22,604,727

5.125% 9/2/08

10,630,000

10,606,136

6.375% 6/15/09

29,220,000

29,893,258

6.625% 9/15/09

3,187,000

3,286,387

Federal Home Loan Bank:

4.5% 10/14/08

2,240,000

2,216,644

5.375% 8/19/11

2,595,000

2,615,041

5.8% 9/2/08

9,855,000

9,913,085

Freddie Mac:

4.75% 3/5/09

4,578,000

4,540,232

5.125% 4/18/11

1,050,000

1,048,639

5.25% 7/18/11

9,750,000

9,776,627

5.75% 3/15/09

1,500,000

1,512,908

Israeli State (guaranteed by U.S. Government through Agency for International Development) 6.8% 2/15/12

2,500,000

2,608,108

Overseas Private Investment Corp. U.S. Government guaranteed participation certificates 6.77% 11/15/13

850,000

859,562

TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS

153,449,543

U.S. Treasury Inflation Protected Obligations - 2.3%

U.S. Treasury Inflation-Indexed Notes:

0.875% 4/15/10

6,068,440

5,786,010

2.375% 4/15/11

1,034,290

1,028,227

2.5% 7/15/16

1,016,540

1,016,961

TOTAL U.S. TREASURY INFLATION PROTECTED OBLIGATIONS

7,831,198

U.S. Treasury Obligations - 27.4%

U.S. Treasury Notes:

4.375% 12/15/10

39,600,000

38,993,645

4.5% 4/30/09 (a)

20,000,000

19,847,968

4.5% 4/30/12 (a)

8,712,000

8,576,605

U.S. Government and Government Agency Obligations - continued

Principal Amount

Value

U.S. Treasury Obligations - continued

U.S. Treasury Notes: - continued

4.75% 3/31/11

$ 9,250,000

$ 9,217,477

4.875% 5/15/09

18,000,000

17,987,346

TOTAL U.S. TREASURY OBLIGATIONS

94,623,041

TOTAL U.S. GOVERNMENT AND GOVERNMENT AGENCY OBLIGATIONS

(Cost $257,688,193)

255,903,782

U.S. Government Agency - Mortgage Securities - 18.1%

Fannie Mae - 14.0%

3.757% 10/1/33 (b)

53,449

53,137

3.787% 6/1/34 (b)

261,659

256,485

3.802% 6/1/33 (b)

45,213

45,290

3.878% 6/1/33 (b)

218,530

218,783

3.902% 5/1/34 (b)

336,766

331,291

3.91% 5/1/33 (b)

239,678

240,504

3.933% 5/1/34 (b)

260,697

256,476

3.945% 5/1/33 (b)

21,222

21,097

3.964% 9/1/33 (b)

467,573

462,735

3.995% 10/1/18 (b)

36,777

36,402

4% 9/1/13 to 5/1/20

1,462,414

1,376,693

4.021% 4/1/33 (b)

17,187

17,171

4.027% 3/1/34 (b)

965,369

951,455

4.072% 3/1/35 (b)

895,690

885,772

4.084% 2/1/35 (b)

25,754

25,766

4.115% 4/1/34 (b)

650,243

641,888

4.124% 5/1/34 (b)

523,602

516,928

4.167% 1/1/35 (b)

121,507

119,174

4.189% 11/1/34 (b)

630,244

630,538

4.25% 2/1/35 (b)

52,635

51,680

4.257% 1/1/34 (b)

132,196

130,907

4.277% 10/1/33 (b)

20,620

20,455

4.277% 5/1/35 (b)

61,543

61,706

4.281% 8/1/33 (b)

103,105

103,101

4.291% 3/1/33 (b)

53,275

53,645

4.292% 3/1/35 (b)

42,813

42,837

4.303% 3/1/33 (b)

35,811

35,120

4.313% 6/1/33 (b)

22,564

22,706

4.322% 4/1/35 (b)

24,487

24,434

U.S. Government Agency - Mortgage Securities - continued

Principal Amount

Value

Fannie Mae - continued

4.347% 1/1/35 (b)

$ 54,650

$ 53,801

4.359% 10/1/19 (b)

54,969

54,189

4.365% 2/1/34 (b)

117,812

116,795

4.397% 2/1/35 (b)

87,417

85,946

4.4% 10/1/34 (b)

214,891

212,254

4.401% 5/1/35 (b)

57,326

57,329

4.421% 8/1/34 (b)

1,253,832

1,239,584

4.425% 5/1/35 (b)

154,799

154,442

4.429% 3/1/35 (b)

93,422

91,893

4.443% 8/1/34 (b)

163,024

161,699

4.484% 12/1/34 (b)

19,888

19,625

4.485% 11/1/33 (b)

81,817

81,285

4.5% 5/1/18 to 10/1/18

42,122

40,425

4.503% 2/1/35 (b)

44,296

44,462

4.511% 2/1/35 (b)

27,398

27,464

4.518% 2/1/35 (b)

575,743

571,940

4.52% 1/1/35 (b)

59,722

59,450

4.522% 7/1/35 (b)

177,457

176,781

4.544% 4/1/33 (b)

529,649

531,746

4.556% 9/1/34 (b)

1,139,348

1,127,969

4.575% 2/1/35 (b)

191,645

189,124

4.575% 7/1/35 (b)

136,265

136,547

4.647% 3/1/35 (b)

373,923

375,920

4.653% 10/1/34 (b)

159,283

157,819

4.687% 2/1/35 (b)

781,062

772,475

4.706% 10/1/34 (b)

134,614

133,519

4.719% 3/1/35 (b)

16,588

16,690

4.725% 7/1/34 (b)

158,974

157,925

4.734% 12/1/35 (b)

2,123,016

2,108,303

4.766% 12/1/34 (b)

49,190

48,768

4.797% 4/1/35 (b)

610,906

610,435

4.8% 7/1/35 (b)

226,846

224,035

4.802% 6/1/35 (b)

178,754

179,060

4.806% 11/1/34 (b)

116,713

115,818

4.81% 1/1/36 (b)

1,248,910

1,236,417

4.812% 2/1/33 (b)

68,137

68,707

4.816% 11/1/35 (b)

521,839

522,379

4.825% 7/1/36 (b)

283,334

282,898

4.84% 10/1/35 (b)

125,407

124,515

4.849% 7/1/35 (b)

359,358

355,284

4.856% 10/1/34 (b)

439,605

436,881

4.881% 8/1/34 (b)

41,964

42,001

U.S. Government Agency - Mortgage Securities - continued

Principal Amount

Value

Fannie Mae - continued

4.888% 10/1/35 (b)

$ 72,253

$ 72,130

4.902% 5/1/35 (b)

87,601

86,732

4.947% 8/1/34 (b)

349,206

347,909

5% 2/1/16 to 5/1/18

4,632,471

4,530,469

5% 6/1/22 (a)

605,000

589,648

5% 6/1/22 (a)

490,000

477,566

5.005% 2/1/34 (b)

391,602

388,259

5.025% 7/1/34 (b)

21,547

21,480

5.054% 12/1/32 (b)

494,684

492,399

5.059% 5/1/35 (b)

307,932

310,296

5.07% 9/1/34 (b)

331,679

330,783

5.084% 9/1/34 (b)

37,555

37,463

5.095% 5/1/35 (b)

110,085

110,761

5.101% 10/1/35 (b)

348,443

346,657

5.111% 1/1/36 (b)

701,189

696,970

5.116% 10/1/35 (b)

228,774

227,535

5.165% 8/1/33 (b)

65,840

65,916

5.167% 3/1/36 (b)

674,507

671,697

5.17% 6/1/35 (b)

214,216

215,358

5.175% 3/1/35 (b)

27,484

27,417

5.268% 11/1/36 (b)

139,254

139,433

5.272% 4/1/36 (b)

281,349

284,111

5.315% 7/1/35 (b)

24,494

24,650

5.328% 12/1/34 (b)

68,797

68,818

5.36% 2/1/36 (b)

399,871

400,471

5.371% 2/1/36 (b)

54,864

54,927

5.386% 12/1/36 (b)

186,680

186,476

5.407% 2/1/37 (b)

147,369

147,347

5.5% 1/1/09 to 3/1/20

4,149,146

4,128,969

5.5% 6/1/22 (a)

1,115,000

1,106,378

5.5% 6/1/22 (a)

130,000

128,995

5.532% 11/1/36 (b)

287,237

287,834

5.651% 12/1/32 (b)

178,632

182,166

5.67% 4/1/36 (b)

603,269

605,135

5.67% 6/1/36 (b)

388,871

390,256

5.757% 4/1/36 (b)

318,883

320,207

5.831% 5/1/36 (b)

928,761

934,307

5.833% 1/1/36 (b)

138,019

138,561

5.837% 3/1/36 (b)

420,610

423,028

6% 5/1/16 to 9/1/19

1,077,820

1,091,270

6.038% 4/1/36 (b)

2,452,898

2,473,372

6.226% 3/1/37 (b)

69,994

70,647

U.S. Government Agency - Mortgage Securities - continued

Principal Amount

Value

Fannie Mae - continued

6.5% 6/1/15 to 3/1/35

$ 1,809,242

$ 1,855,974

6.5% 6/1/22 (a)

750,000

766,533

6.5% 6/1/37 (a)

150,000

152,332

7% 6/1/12 to 6/1/31

410,537

420,128

7.5% 5/1/37

205,000

212,623

8% 8/1/09

580

580

9% 2/1/13 to 8/1/21

159,194

169,282

9.5% 5/1/09 to 11/1/21

7,242

7,458

10.5% 5/1/10 to 8/1/20

33,621

36,542

11% 11/1/10 to 9/1/14

152,041

161,024

11.5% 11/1/15 to 7/15/19

141,889

157,372

12% 4/1/15

13,432

15,387

12.5% 3/1/16

4,267

4,694

48,433,507

Freddie Mac - 3.9%

3.379% 7/1/33 (b)

457,379

452,134

4% 11/1/20

976,734

914,648

4.288% 2/1/35 (b)

145,264

145,146

4.29% 3/1/35 (b)

62,787

62,444

4.299% 12/1/34 (b)

67,539

66,220

4.425% 3/1/35 (b)

75,401

73,869

4.427% 2/1/34 (b)

68,532

67,768

4.429% 6/1/35 (b)

117,457

116,685

4.456% 3/1/35 (b)

81,355

79,844

4.5% 2/1/18 to 11/1/20

291,452

280,129

4.541% 2/1/35 (b)

147,364

144,741

4.701% 9/1/36 (b)

160,000

158,887

4.777% 3/1/33 (b)

23,327

23,612

4.794% 2/1/36 (b)

71,308

70,317

4.842% 5/1/35 (b)

1,338,944

1,320,778

4.932% 10/1/36 (b)

851,477

848,227

4.991% 4/1/35 (b)

350,470

351,557

5% 9/1/18 to 9/1/35

1,410,860

1,381,323

5.124% 4/1/35 (b)

247,066

245,221

5.126% 7/1/35 (b)

260,177

257,751

5.266% 11/1/35 (b)

251,270

250,754

5.29% 2/1/36 (b)

22,197

22,064

5.498% 1/1/36 (b)

212,913

212,642

5.5% 8/1/14 to 11/1/20

1,731,708

1,722,266

5.538% 1/1/36 (b)

313,672

313,247

5.586% 3/1/36 (b)

1,007,376

1,006,920

U.S. Government Agency - Mortgage Securities - continued

Principal Amount

Value

Freddie Mac - continued

6% 11/1/16 to 2/1/19

$ 422,757

$ 427,661

6.299% 8/1/36 (b)

1,622,584

1,635,873

6.5% 5/1/08

9,428

9,635

7.5% 11/1/12

118,547

121,527

8% 9/1/07 to 12/1/09

12,082

12,088

8.5% 7/1/07 to 6/1/14

12,004

12,023

9% 9/1/10 to 12/1/18

52,625

56,176

9.5% 2/1/17 to 12/1/22

192,565

207,640

10% 1/1/09 to 6/1/20

32,440

34,079

10.5% 9/1/20 to 5/1/21

13,522

14,028

11% 12/1/11

1,327

1,400

11.5% 10/1/15

4,508

5,057

12% 10/1/13 to 11/1/19

17,709

19,816

12.25% 11/1/14

21,574

24,308

12.5% 8/1/10 to 6/1/19

133,135

147,287

13,317,792

Government National Mortgage Association - 0.2%

8% 11/15/09 to 12/15/23

503,353

520,083

8.5% 5/15/16 to 3/15/17

44,914

47,925

10.5% 1/15/16 to 1/15/18

78,051

87,334

11% 10/20/13

1,707

1,886

13.5% 7/15/11

4,065

4,472

661,700

TOTAL U.S. GOVERNMENT AGENCY - MORTGAGE SECURITIES

(Cost $62,617,859)

62,412,999

Asset-Backed Securities - 0.9%

Fannie Mae Grantor Trust Series 2005-T4 Class A1C, 5.47% 9/25/35 (b)
(Cost $3,236,657)

3,236,657

3,239,473

Collateralized Mortgage Obligations - 9.7%

U.S. Government Agency - 9.7%

Fannie Mae:

floater Series 1994-42 Class FK, 4.08% 4/25/24 (b)

1,594,277

1,518,236

planned amortization class:

Series 2002-83 Class ME, 5% 12/25/17

2,390,000

2,323,483

Series 2003-39 Class PV, 5.5% 9/25/22

974,937

970,499

Collateralized Mortgage Obligations - continued

Principal Amount

Value

U.S. Government Agency - continued

Fannie Mae: - continued

sequential payer:

Series 1993-238 Class C, 6.5% 12/25/08

$ 1,120,928

$ 1,121,672

Series 1999-25 Class Z, 6% 6/25/29

3,027,125

3,058,150

Fannie Mae Grantor Trust sequential payer Series 2005-93 Class HD, 4.5% 11/25/19

71,120

68,832

Fannie Mae subordinate REMIC pass-thru certificates:

floater:

Series 2001-38 Class QF, 6.3% 8/25/31 (b)

392,034

401,394

Series 2002-49 Class FB, 5.92% 11/18/31 (b)

638,815

649,841

Series 2002-60 Class FV, 6.32% 4/25/32 (b)

138,059

142,118

Series 2002-74 Class FV, 5.77% 11/25/32 (b)

1,435,256

1,445,623

Series 2002-75 Class FA, 6.32% 11/25/32 (b)

282,812

291,127

planned amortization class:

Series 2002-11:

Class QB, 5.5% 3/25/15

7,745

7,719

Class UC, 6% 3/25/17

621,511

626,150

Series 2002-16 Class PG, 6% 4/25/17

670,000

675,780

Series 2004-81 Class KC, 4.5% 4/25/17

325,000

316,818

sequential payer:

Series 2002-56 Class MC, 5.5% 9/25/17

195,250

194,349

Series 2002-58 Class HC, 5.5% 9/25/17

1,888,625

1,882,130

Series 2003-18 Class EY, 5% 6/25/17

1,012,068

997,365

Series 2005-4 Class ED, 5% 6/25/27

3,433,333

3,407,130

Series 2002-50 Class LE, 7% 12/25/29

6,251

6,235

Freddie Mac planned amortization class Series 2356 Class GD, 6% 9/15/16

217,117

219,137

Freddie Mac Multi-class participation certificates guaranteed:

floater:

Series 2448 Class FT, 6.32% 3/15/32 (b)

626,264

641,988

Series 2526 Class FC, 5.72% 11/15/32 (b)

354,858

357,178

Series 2530 Class FE, 5.92% 2/15/32 (b)

360,125

365,398

Series 2630 Class FL, 5.82% 6/15/18 (b)

24,979

25,274

planned amortization class:

Series 2363 Class PF, 6% 9/15/16

290,747

293,357

Series 2645 Class PW, 3.25% 7/15/26

984,437

953,935

Series 2649 Class TQ, 3.5% 12/15/21

305,294

302,647

Series 2752 Class PW, 4% 4/15/22

971,664

959,201

sequential payer:

Series 1929 Class EZ, 7.5% 2/17/27

1,159,990

1,202,533

Series 2570 Class CU, 4.5% 7/15/17

105,286

102,631

Collateralized Mortgage Obligations - continued

Principal Amount

Value

U.S. Government Agency - continued

Freddie Mac Multi-class participation certificates guaranteed: - continued

sequential payer:

Series 2572 Class HK, 4% 2/15/17

$ 156,810

$ 151,835

Series 2617 Class GW, 3.5% 6/15/16

960,162

941,124

Series 2672 Class HA, 4% 9/15/16

1,135,389

1,096,777

Series 2675 Class CB, 4% 5/15/16

900,380

871,782

Series 2683 Class JA, 4% 10/15/16

933,582

901,454

Series 2860 Class CP, 4% 10/15/17

118,256

114,747

Series 2866 Class N, 4.5% 12/15/18

680,000

666,746

Series 2937 Class HJ, 5% 10/15/19

489,197

481,194

Series 3013 Class VJ, 5% 1/15/14

1,080,854

1,065,180

Ginnie Mae guaranteed REMIC pass-thru securities planned amortization class Series 2005-58 Class NJ, 4.5% 8/20/35

1,630,000

1,591,708

TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS

(Cost $33,786,671)

33,410,477

Cash Equivalents - 4.9%

Maturity Amount

Investments in repurchase agreements in a joint trading account at 5.32%, dated 5/31/07 due 6/1/07 (Collateralized by U.S. Government Obligations) #
(Cost $16,790,000)

$ 16,792,480

16,790,000

TOTAL INVESTMENT PORTFOLIO - 107.8%

(Cost $374,119,380)

371,756,731

NET OTHER ASSETS - (7.8)%

(26,977,202)

NET ASSETS - 100%

$ 344,779,529

Swap Agreements

Expiration Date

Notional Amount

Value

Interest Rate Swaps

Receive quarterly a floating rate based on 3-month LIBOR and pay semi-annually a fixed rate equal to 5.254% with Credit Suisse First Boston

June 2009

$ 3,500,000

$ 5,854

Receive quarterly a floating rate based on 3-month LIBOR and pay semi-annually a fixed rate equal to 5.35% with Bank of America

April 2037

850,000

31,891

$ 4,350,000

$ 37,745

Legend

(a) Security or a portion of the security purchased on a delayed delivery or when-issued basis.

(b) The coupon rate shown on floating or adjustable rate securities represents the rate at period end.

# Additional Information on each counterparty to the repurchase agreement is as follows:

Repurchase Agreement / Counterparty

Value

$16,790,000 due 6/1/07 at 5.32%

ABN AMRO Bank N.V.,
New York Branch

$ 136,052

BNP Paribas Securities Corp.

193,003

Banc of America Securities LLC

5,643,987

Bank of America, NA

772,011

Barclays Capital, Inc.

1,494,930

Citigroup Global Markets, Inc.

386,005

Countrywide Securities Corp.

1,930,026

Greenwich Capital Markets, Inc.

193,003

Merrill Lynch Government Securities, Inc.

386,005

Societe Generale,
New York Branch

1,447,520

UBS Securities LLC

3,860,053

WestLB AG

347,405

$ 16,790,000

Income Tax Information

At November 30, 2006, the fund had a capital loss carryforward of approximately $19,843,511 of which $5,799,739, $4,168,919, $1,483,869, $4,816,509 and $3,574,475 will expire on November 30, 2007, 2008, 2012, 2013 and 2014, respectively.

See accompanying notes which are an integral part of the financial statements.

Semiannual Report

Financial Statements

Statement of Assets and Liabilities

May 31, 2007 (Unaudited)

Assets

Investment in securities, at value (including repurchase agreements of $16,790,000) - See accompanying schedule:

Unaffiliated issuers (cost $374,119,380)

$ 371,756,731

Cash

910

Receivable for investments sold

535,223

Receivable for fund shares sold

369,786

Interest receivable

4,332,614

Swap agreements, at value

37,745

Total assets

377,033,009

Liabilities

Payable for investments purchased
Regular delivery

$ 7,170,547

Delayed delivery

24,685,310

Payable for fund shares redeemed

230,179

Distributions payable

36,785

Accrued management fee

129,755

Other affiliated payables

904

Total liabilities

32,253,480

Net Assets

$ 344,779,529

Net Assets consist of:

Paid in capital

$ 366,688,627

Undistributed net investment income

1,201,536

Accumulated undistributed net realized gain (loss) on investments

(20,785,730)

Net unrealized appreciation (depreciation) on investments

(2,324,904)

Net Assets, for 36,419,242 shares outstanding

$ 344,779,529

Net Asset Value, offering price and redemption price per share ($344,779,529 ÷ 36,419,242 shares)

$ 9.47

See accompanying notes which are an integral part of the financial statements.

Semiannual Report

Financial Statements - continued

Statement of Operations

Six months ended May 31, 2007 (Unaudited)

Investment Income

Interest

$ 7,908,732

Expenses

Management fee

$ 766,647

Independent trustees' compensation

573

Miscellaneous

419

Total expenses before reductions

767,639

Expense reductions

(26,917)

740,722

Net investment income

7,168,010

Realized and Unrealized Gain (Loss)

Net realized gain (loss) on:

Investment securities:

Unaffiliated issuers

(903,795)

Swap agreements

(52,251)

Total net realized gain (loss)

(956,046)

Change in net unrealized appreciation (depreciation) on:

Investment securities

(1,740,929)

Swap agreements

37,745

Total change in net unrealized appreciation (depreciation)

(1,703,184)

Net gain (loss)

(2,659,230)

Net increase (decrease) in net assets resulting from operations

$ 4,508,780

See accompanying notes which are an integral part of the financial statements.

Semiannual Report

Statement of Changes in Net Assets

Six months ended May 31, 2007
(Unaudited)

Year ended
November 30, 2006

Increase (Decrease) in Net Assets

Operations

Net investment income

$ 7,168,010

$ 14,237,579

Net realized gain (loss)

(956,046)

(4,160,439)

Change in net unrealized appreciation (depreciation)

(1,703,184)

4,629,247

Net increase (decrease) in net assets resulting
from operations

4,508,780

14,706,387

Distributions to shareholders from net investment income

(7,644,262)

(13,677,962)

Share transactions
Proceeds from sales of shares

48,155,137

79,142,633

Reinvestment of distributions

7,397,673

13,207,771

Cost of shares redeemed

(50,762,862)

(178,939,958)

Net increase (decrease) in net assets resulting from share transactions

4,789,948

(86,589,554)

Total increase (decrease) in net assets

1,654,466

(85,561,129)

Net Assets

Beginning of period

343,125,063

428,686,192

End of period (including undistributed net investment income of $1,201,536 and undistributed net investment income of $1,677,788, respectively)

$ 344,779,529

$ 343,125,063

Other Information

Shares

Sold

5,064,178

8,366,309

Issued in reinvestment of distributions

779,016

1,393,237

Redeemed

(5,342,977)

(18,873,327)

Net increase (decrease)

500,217

(9,113,781)

See accompanying notes which are an integral part of the financial statements.

Semiannual Report

Financial Highlights

Six months ended
May 31, 2007

Years ended November 30,

(Unaudited)

2006

2005

2004

2003

2002

Selected Per-Share Data

Net asset value, beginning of
period

$ 9.55

$ 9.52

$ 9.65

$ 9.71

$ 9.71

$ 9.51

Income
from Investment Operations

Net investment
income D

.200

.382

.293

.225

.236

.376

Net realized and
unrealized gain (loss)

(.067)

.012

(.160)

(.060)

.004

.206

Total from investment operations

.133

.394

.133

.165

.240

.582

Distributions from net investment income

(.213)

(.364)

(.263)

(.225)

(.240)

(.382)

Net asset value, end
of period

$ 9.47

$ 9.55

$ 9.52

$ 9.65

$ 9.71

$ 9.71

Total Return B, C

1.41%

4.24%

1.39%

1.71%

2.48%

6.25%

Ratios to Average Net Assets E

Expenses before
reductions

.45% A

.45%

.45%

.45%

.45%

.45%

Expenses net of fee waivers, if any

.45% A

.45%

.45%

.45%

.45%

.45%

Expenses net of all reductions

.44% A

.44%

.44%

.45%

.44%

.45%

Net investment
income

4.22% A

4.03%

3.05%

2.31%

2.42%

3.92%

Supplemental Data

Net assets,
end of period
(000 omitted)

$ 344,780

$ 343,125

$ 428,686

$ 485,782

$ 527,063

$ 501,942

Portfolio turnover rate

125% A

126%

96%

165%

289%

219%

A Annualized

B Total returns for periods of less than one year are not annualized.

C Total returns would have been lower had certain expenses not been reduced during the periods shown.

D Calculated based on average shares outstanding during the period.

E Expense ratios reflect operating expenses of the Fund. Expenses before reductions do not reflect amounts reimbursed by the investment adviser or expense offset arrangements and do not represent the amount paid by the Fund during periods when reimbursements or reductions occur. Expenses net of fee waivers reflect expenses after reimbursement by the investment adviser but prior to reductions from expense offset arrangements. Expenses net of all reductions represent the net expenses paid by the Fund.

See accompanying notes which are an integral part of the financial statements.

Semiannual Report

Notes to Financial Statements

For the period ended May 31, 2007 (Unaudited)

1. Organization.

Fidelity Institutional Short-Intermediate Government Fund (the Fund) is a fund of Fidelity Advisor Series IV (the trust) and is authorized to issue an unlimited number of shares. The trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Massachusetts business trust.

2. Significant Accounting Policies.

The financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America, which require management to make certain estimates and assumptions at the date of the financial statements. The following summarizes the significant accounting policies of the Fund:

Security Valuation. Investments are valued and net asset value per share is calculated (NAV calculation) as of the close of business of the New York Stock Exchange, normally 4:00 p.m. Eastern time. Wherever possible, the Fund uses independent pricing services approved by the Board of Trustees to value its investments. Debt securities, including restricted securities, for which quotes are readily available, are valued by independent pricing services or by dealers who make markets in such securities. Pricing services consider yield or price of bonds of comparable quality, coupon, maturity and type as well as dealer supplied prices. When current market prices or quotations are not readily available or do not accurately reflect fair value, valuations may be determined in accordance with procedures adopted by the Board of Trustees. The frequency of when fair value pricing is used is unpredictable. The value of securities used for NAV calculation under fair value pricing may differ from published prices for the same securities. Investments in open-end mutual funds are valued at their closing net asset value each business day. Short-term securities with remaining maturities of sixty days or less for which quotations are not readily available are valued at amortized cost, which approximates value.

Investment Transactions and Income. For financial reporting purposes, the Fund's investment holdings and NAV include trades executed through the end of the last business day of the period. The NAV for processing shareholder transactions includes trades executed through the end of the prior business day. Gains and losses on securities sold are determined on the basis of identified cost. Interest income is accrued as earned. Interest income includes coupon interest and amortization of premium and accretion of discount on debt securities.

Expenses. Most expenses of the trust can be directly attributed to a fund. Expenses which cannot be directly attributed are apportioned among each Fund in the trust. Expense estimates are accrued in the period to which they relate and adjustments are made when actual amounts are known.

Semiannual Report

Notes to Financial Statements (Unaudited) - continued

2. Significant Accounting Policies - continued

Income Tax Information and Distributions to Shareholders. Each year, the Fund intends to qualify as a regulated investment company by distributing all of its taxable income and realized gains under Subchapter M of the Internal Revenue Code. As a result, no provision for income taxes is required in the accompanying financial statements.

Dividends are declared daily and paid monthly from net investment income. Distributions from realized gains, if any, are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from generally accepted accounting principles.

Capital accounts within the financial statements are adjusted for permanent book-tax differences. These adjustments have no impact on net assets or the results of operations. Temporary book-tax differences will reverse in a subsequent period.

Book-tax differences are primarily due to prior period premium and discount on debt securities, market discount, deferred trustees compensation, financing transactions, and capital loss carryforwards.

The federal tax cost of investments and unrealized appreciation (depreciation) as of period end were as follows:

Unrealized appreciation

$ 279,346

Unrealized depreciation

(2,494,570)

Net unrealized appreciation (depreciation)

$ (2,215,224)

Cost for federal income tax purposes

$ 373,971,955

New Accounting Pronouncements. In July 2006, Financial Accounting Standards Board Interpretation No. 48, Accounting for Uncertainty in Income Taxes - an interpretation of FASB Statement 109 (FIN 48), was issued and is effective on the last business day of the semiannual reporting period for fiscal years beginning after December 15, 2006. FIN 48 sets forth a threshold for financial statement recognition, measurement and disclosure of a tax position taken or expected to be taken on a tax return. Management has concluded that the adoption of FIN 48 will not result in a material impact on the Fund's net assets, results of operations and financial statement disclosures.

In addition, in September 2006, Statement of Financial Accounting Standards No. 157, Fair Value Measurements (SFAS 157), was issued and is effective for fiscal years beginning after November 15, 2007. SFAS 157 defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. Management is currently evaluating the impact the adoption of SFAS 157 will have on the Fund's financial statement disclosures.

Semiannual Report

3. Operating Policies.

Repurchase Agreements. Fidelity Management & Research Company (FMR) has received an Exemptive Order from the Securities and Exchange Commission (the SEC) which permits the Fund and other affiliated entities of FMR to transfer uninvested cash balances into joint trading accounts which are then invested in repurchase agreements. The Fund may also invest directly with institutions in repurchase agreements. Repurchase agreements are collateralized by government or non-government securities. Upon settlement date, collateral is held in segregated accounts with custodian banks and may be obtained in the event of a default of the counterparty. The Fund monitors, on a daily basis, the value of the collateral to ensure it is at least equal to the principal amount of the repurchase agreement (including accrued interest). In the event of a default by the counterparty, realization of the collateral proceeds could be delayed, during which time the value of the collateral may decline.

Delayed Delivery Transactions and When-Issued Securities. The Fund may purchase or sell securities on a delayed delivery or when-issued basis. Payment and delivery may take place after the customary settlement period for that security. The price of the underlying securities and the date when the securities will be delivered and paid for are fixed at the time the transaction is negotiated. During the time a delayed delivery sell is outstanding, the contract is marked-to-market daily and equivalent deliverable securities are held for the transaction. The value of the securities purchased on a delayed delivery or when-issued basis are identified as such in the Fund's Schedule of Investments. The Fund may receive compensation for interest forgone in the purchase of a delayed delivery or when-issued security. With respect to purchase commitments, the Fund identifies securities as segregated in its records with a value at least equal to the amount of the commitment. Losses may arise due to changes in the value of the underlying securities or if the counterparty does not perform under the contract's terms, or if the issuer does not issue the securities due to political, economic, or other factors.

Swap Agreements. The Fund may invest in swaps for the purpose of managing its exposure to interest rate, credit or market risk.

Interest rate swaps are agreements to exchange cash flows periodically based on a notional principal amount, for example, the exchange of fixed rate interest payments for floating rate interest payments. Periodic payments received or made by the Fund are recorded in the accompanying Statement of Operations as realized gains or losses, respectively. The primary risk associated with interest rate swaps is that unfavorable changes in the fluctuation of interest rates could adversely impact a fund.

Swaps are marked-to-market daily based on dealer-supplied valuations and changes in value are recorded as unrealized appreciation (depreciation). Gains or losses are realized upon early termination of the swap agreement. Collateral, in the form of cash or securities, may be required to be held in segregated accounts with a fund's custodian in

Semiannual Report

Notes to Financial Statements (Unaudited) - continued

3. Operating Policies - continued

Swap Agreements - continued

compliance with swap contracts. Risks may exceed amounts recognized on the Statement of Assets and Liabilities. These risks include changes in the returns of the underlying instruments, failure of the counterparties to perform under the contracts' terms and the possible lack of liquidity with respect to the swap agreements. Details of swap agreements open at period end are included in the Fund's Schedule of Investments under the caption "Swap Agreements."

Mortgage Dollar Rolls. To earn additional income, the Fund may employ trading strategies which involve the sale and simultaneous agreement to repurchase similar securities ("mortgage dollar rolls") or the purchase and simultaneous agreement to sell similar securities ("reverse mortgage dollar rolls"). The securities traded are mortgage securities and bear the same interest rate but may be collateralized by different pools of mortgages. During the period between the sale and repurchase in a mortgage dollar roll transaction, a fund will not be entitled to receive interest and principal payments on the securities sold but will invest the proceeds of the sale in other securities which may enhance the yield and total return. In addition, the difference between the sale price and the future purchase price is recorded as an adjustment to investment income. During the period between the purchase and subsequent sale in a reverse mortgage dollar roll transaction a fund is entitled to interest and principal payments on the securities purchased. The price differential between the purchase and sale is recorded as an adjustment to investment income. Losses may arise due to changes in the value of the securities or if the counterparty does not perform under the terms of the agreement. If the counterparty files for bankruptcy or becomes insolvent, a fund's right to repurchase or sell securities may be limited.

4. Fees and Other Transactions with Affiliates.

Management Fee. FMR and its affiliates provide the Fund with investment management related services for which the Fund pays a monthly management fee that is based on an annual rate of .45% of the Fund's average net assets. FMR pays all other expenses, except the compensation of the independent Trustees and certain exceptions such as interest expense, including commitment fees. The management fee paid to FMR by the Fund is reduced by an amount equal to the fees and expenses paid by the Fund to the independent Trustees.

5. Committed Line of Credit.

The Fund participates with other funds managed by FMR in a $4.2 billion credit facility (the "line of credit") to be utilized for temporary or emergency purposes to fund shareholder redemptions or for other short-term liquidity purposes. The Fund has agreed to

Semiannual Report

5. Committed Line of Credit - continued

pay commitment fees on its pro rata portion of the line of credit, which amounted to $419 and is reflected in Miscellaneous Expense on the Statement of Operations. During the period, there were no borrowings on this line of credit.

6. Security Lending.

The Fund lends portfolio securities from time to time in order to earn additional income. On the settlement date of the loan, the Fund receives collateral (in the form of U.S. Treasury obligations, letters of credit and/or cash) against the loaned securities and maintains collateral in an amount not less than 100% of the market value of the loaned securities during the period of the loan. The market value of the loaned securities is determined at the close of business of the Fund and any additional required collateral is delivered to the Fund on the next business day. If the borrower defaults on its obligation to return the securities loaned because of insolvency or other reasons, a fund could experience delays and costs in recovering the securities loaned or in gaining access to the collateral. Any cash collateral received is invested in cash equivalents. At period end, there were no security loans outstanding. Security lending income represents the income earned on investing cash collateral, less fees and expenses associated with the loan, plus any premium payments that may be received on the loan of certain types of securities. Security lending income is presented in the Statement of Operations as a component of interest income. Net income from lending portfolio securities during the period amounted to $1,881.

7. Expense Reductions.

Through arrangements with the Fund's custodian and transfer agent, credits realized as a result of uninvested cash balances were used to reduce the Fund's management fee. During the period, these credits reduced the Fund's management fee by $26,917.

8. Other.

The Fund's organizational documents provide former and current trustees and officers with a limited indemnification against liabilities arising in connection with the performance of their duties to the Fund. In the normal course of business, the Fund may also enter into contracts that provide general indemnifications. The Fund's maximum exposure under these arrangements is unknown as this would be dependent on future claims that may be made against the Fund. The risk of material loss from such claims is considered remote.

Semiannual Report

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Investment Adviser

Fidelity Management & Research Company

Boston, MA

Investment Sub-Advisers

Fidelity Investments Money
Management, Inc.

Fidelity International Investment
Advisors

Fidelity International Investment
Advisors (U.K.) Limited

Fidelity Research & Analysis Company
(formerly Fidelity Management &
Research (Far East) Inc.)

General Distributor

Fidelity Distributors Corporation

Boston, MA

Transfer and Service Agents

Fidelity Investments Institutional Operations Company, Inc.

Boston, MA

Fidelity Service Company, Inc.

Boston, MA

Custodian

The Bank of New York

New York, NY

ISIG-USAN-0707
1.786814.104

(Fidelity Investment logo)(registered trademark)
Corporate Headquarters
82 Devonshire St., Boston, MA 02109
www.fidelity.com

Fidelity®

Real Estate High Income

Fund

Semiannual Report

May 31, 2007

(2_fidelity_logos) (Registered_Trademark)

Contents

Chairman's Message

<Click Here>

Ned Johnson's message to shareholders.

Shareholder Expense Example

<Click Here>

An example of shareholder expenses.

Investment Changes

<Click Here>

A summary of major shifts in the fund's investments over the past six months.

Investments

<Click Here>

A complete list of the fund's investments with their
market values.

Financial Statements

<Click Here>

Statements of assets and liabilities, operations, and changes in net assets, as well as financial highlights.

Notes

<Click Here>

Notes to the financial statements.

Report of Independent Registered Public Accounting Firm

<Click Here>

Board Approval of Investment Advisory Contracts and Management Fees

<Click Here>

To view a fund's proxy voting guidelines and proxy voting record for the 12-month period ended June 30, visit http://www.fidelity.com (search for "proxy voting guidelines") or visit the Securities and Exchange Commission's (SEC) web site at http://www.sec.gov. You may also call Fidelity (collect) at 1-617-563-6414 to request a free copy of the proxy voting guidelines.

Standard & Poor's, S&P and S&P 500 are registered service marks of The McGraw-Hill Companies, Inc. and have been licensed for use by Fidelity Distributors Corporation.

Other third party marks appearing herein are the property of their respective owners.

All other marks appearing herein are registered or unregistered trademarks or service marks of FMR Corp. or an affiliated company.

This report and the financial statements contained herein are submitted for the general information of the shareholders of the fund. This report is not authorized for distribution to prospective investors in the fund unless preceded or accompanied by an effective prospectus.

A fund files its complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-Q. Forms N-Q are available on the SEC's web site at http://www.sec.gov. A fund's Forms N-Q may be reviewed and copied at the SEC's Public Reference Room in Washington, DC. Information regarding the operation of the SEC's Public Reference Room may be obtained by calling 1-800-SEC-0330.

NOT FDIC INSURED · MAY LOSE VALUE · NO BANK GUARANTEE

Neither the fund nor Fidelity Distributors Corporation is a bank.

For more information on the fund, including charges and expenses, call Fidelity (collect) at 617-563-6414 for a free prospectus. Read it carefully before you invest or send money.

Semiannual Report

Chairman's Message

(Photograph of Edward C. Johnson 3d.)

Dear Shareholder:

Stocks are currently on pace to register their fifth-straight year of positive returns, although gains could be trimmed if the U.S. economy continues to slow. While financial markets are always unpredictable, there are a number of time-tested principles that can put the historical odds in your favor.

One of the basic tenets is to invest for the long term. Over time, riding out the markets' inevitable ups and downs has proven much more effective than selling into panic or chasing the hottest trend. Even missing only a few of the markets' best days can significantly diminish investor returns. Patience also affords the benefits of compounding - of earning interest on additional income or reinvested dividends and capital gains. There are tax advantages and cost benefits to consider as well. The more you sell, the more taxes you pay, and the more you trade, the higher the costs. While staying the course doesn't eliminate risk, it can considerably lessen the effect of short-term declines.

You can further manage your investing risk through diversification. And today, more than ever, geographic diversification should be taken into account. Studies

indicate that asset allocation is the single most important determinant of a portfolio's long-term success. The right mix of stocks, bonds and cash - aligned to your particular risk tolerance and investment objective - is very important. Age-appropriate rebalancing is also an essential aspect of asset allocation. For younger investors, an emphasis on equities - which historically have been the best-performing asset class over time - is encouraged. As investors near their specific goal, such as retirement or sending a child to college, consideration may be given to replacing volatile assets (e.g. common stocks) with more-stable fixed investments (bonds or savings plans).

A third investment principle - investing regularly - can help lower the average cost of your purchases. Investing a certain amount of money each month or quarter helps ensure you won't pay for all your shares at market highs. This strategy - known as dollar cost averaging - also reduces unconstructive "emotion" from investing, helping shareholders avoid selling weak performers just prior to an upswing, or chasing a hot performer just before a correction.

We invite you to contact us via the Internet, through our Investor Centers or over the phone. It is our privilege to provide you the information you need to make the investments that are right for you.

Sincerely,

/s/Edward C. Johnson 3d

Edward C. Johnson 3d

Semiannual Report

Shareholder Expense Example

As a shareholder of the Fund, you incur two types of costs: (1) transaction costs, and (2) ongoing costs, including management fees and other Fund expenses. This Example is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds.

The Example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period (December 1, 2006 to May 31, 2007).

Actual Expenses

The first line of the accompanying table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000.00 (for example, an $8,600 account value divided by $1,000.00 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period.

Hypothetical Example for Comparison Purposes

The second line of the accompanying table provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transaction costs. Therefore, the second line of the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds.

Beginning
Account Value
December 1, 2006

Ending
Account Value
May 31, 2007

Expenses Paid
During Period
*
December 1, 2006
to May 31, 2007

Actual

$ 1,000.00

$ 1,014.90

$ 4.17

Hypothetical (5% return per year before expenses)

$ 1,000.00

$ 1,020.79

$ 4.18

* Expenses are equal to the Fund's annualized expense ratio of .83%; multiplied by the average account value over the period, multiplied by 182/365 (to reflect the one-half year period).

Semiannual Report

Investment Changes

Quality Diversification (% of fund's net assets)

We have used ratings from Moody's® Investors Services, Inc. Where Moody's ratings are not available, we have used S&P® ratings. Where neither Moody's or S&P ratings are available, we have used Fitch ratings.

Asset Allocation (% of fund's net assets)

Semiannual Report

Investments May 31, 2007

Showing Percentage of Net Assets

Corporate Bonds - 8.0%

Principal
Amount (b)

Value

Convertible Bonds - 0.4%

Homebuilding/Real Estate - 0.4%

American Financial Realty Trust 4.375% 7/15/24

$ 2,260,000

$ 2,197,850

Nonconvertible Bonds - 7.6%

Diversified Financial Services - 0.7%

Thornburg Mortgage, Inc. 8% 5/15/13

3,000,000

3,000,000

Wrightwood Capital LLC 9% 6/1/14 (c)

1,000,000

995,000

3,995,000

Food and Drug Retail - 0.2%

Stater Brothers Holdings, Inc. 8.125% 6/15/12

1,000,000

1,035,000

Healthcare - 2.1%

Omega Healthcare Investors, Inc.:

7% 4/1/14

2,290,000

2,341,525

7% 1/15/16

1,000,000

1,025,000

Senior Housing Properties Trust:

7.875% 4/15/15

1,395,000

1,457,775

8.625% 1/15/12

1,405,000

1,524,425

Skilled Healthcare Group, Inc. 11% 1/15/14 (c)

2,310,000

2,604,525

Sun Healthcare Group, Inc. 9.125% 4/15/15 (c)

120,000

126,000

Ventas Realty LP:

6.5% 6/1/16

750,000

755,625

6.625% 10/15/14

500,000

505,000

6.75% 6/1/10

780,000

795,600

6.75% 4/1/17

1,190,000

1,215,288

12,350,763

Homebuilding/Real Estate - 3.4%

American Real Estate Partners/American Real Estate Finance Corp.:

7.125% 2/15/13

750,000

738,750

8.125% 6/1/12

1,475,000

1,500,813

Crescent Real Estate Equities LP/Crescent Finance Co. 9.25% 4/15/09

2,340,000

2,386,800

Forest City Enterprises, Inc.:

6.5% 2/1/17

2,000,000

1,930,000

7.625% 6/1/15

500,000

510,000

Highwoods/Forsyth LP 5.85% 3/15/17 (c)

2,000,000

1,952,500

HMB Capital Trust V 8.99% 12/15/36 (c)(e)

1,000,000

820,000

iStar Financial, Inc. 5.15% 3/1/12

5,000,000

4,825,940

Nationwide Health Properties, Inc. 6% 5/20/15

1,000,000

986,374

Principal
Amount (b)

Value

Rouse Co. 5.375% 11/26/13

$ 2,100,000

$ 1,978,603

Rouse Co. LP/TRC, Inc. 6.75% 5/1/13 (c)

2,850,000

2,864,250

20,494,030

Hotels - 0.8%

Host Marriott LP 6.375% 3/15/15

2,000,000

1,990,000

Times Square Hotel Trust 8.528% 8/1/26 (c)

2,557,273

2,940,864

4,930,864

Restaurants - 0.4%

Landry's Seafood Restaurants, Inc. 7.5% 12/15/14

2,350,000

2,332,375

TOTAL NONCONVERTIBLE BONDS

45,138,032

TOTAL CORPORATE BONDS

(Cost $46,835,099)

47,335,882

Asset-Backed Securities - 8.9%

Ameriquest Mortgage Securities, Inc. Series 2004-R9 Class M9, 7.82% 10/25/34 (c)(e)

2,014,000

1,969,429

Anthracite CDO I Ltd. Series 2002-CIBA Class E, 9.314% 5/24/37 (c)

1,500,000

1,653,516

Argent Securities, Inc. Series 2004-W9 Class M7, 7.4018% 6/26/34 (e)

1,035,000

1,006,552

Atherton Franchise Loan Funding LLP:

Series 1998-A Class E, 8.25% 5/15/20 (c)(d)

1,500,000

495,000

Series 1998-A Class F, 7.44% 11/15/14 (a)(c)

857,043

0

Capital Trust RE CDO Ltd. Series 2005-1A:

Class D, 6.82% 3/20/50 (c)(e)

750,000

755,475

Class E, 7.42% 3/20/50 (c)(e)

3,000,000

3,003,109

Concord Real Estate CDO Ltd./LLC Series 2006-1A:

Class E, 6.52% 12/25/46 (c)(e)

1,950,000

1,915,908

Class F, 7.07% 12/25/46 (c)(e)

250,000

243,111

Countrywide Home Loan Trust Series 2006-BC2N Class N, 6.5% 2/25/47 (c)

392,166

279,418

Crest Clarendon Street Ltd./Crest Clarendon Corp. Series 2002-1A Class D, 9% 12/28/35 (c)

5,170,000

5,354,052

Crest Dartmouth Street Ltd./Crest Dartmouth Street Corp. Series 2003-1A Class D, 9% 6/28/38 (c)

4,100,000

4,295,570

Crest G-Star Ltd. Series 2001-2A Class C, 10% 2/25/32 (c)

1,330,000

1,330,000

Asset-Backed Securities - continued

Principal
Amount (b)

Value

Crest Ltd.:

Series 2000-1A Class D, 10% 8/31/36 (c)

$ 2,200,000

$ 1,557,380

Series 2004-1A Class H1, 9.05% 1/28/40 (c)(e)

2,150,000

2,142,690

Fairfield Street Solar Corp. Series 2004-1A:

Class E1, 8.725% 11/28/39 (c)(e)

1,000,000

984,400

Class F, 10.225% 11/28/39 (c)(e)

1,050,000

1,021,020

G-Star Ltd. Series 2002-1A Class C, 8% 4/25/37 (c)

4,500,000

4,232,285

Gramercy Real Estate CDO Ltd. Series 2005-1A Class H, 7.355% 7/25/35 (c)(e)

1,700,000

1,695,750

GSAMP Trust Series 2005-HE3 Class B3, 7.82% 6/25/35 (e)

1,070,000

860,120

Guggenheim Structured Real Estate Funding Ltd. Series 2006-3 Class E, 6.97% 9/25/46 (c)(e)

1,580,000

1,528,176

Guggenheim Structured Real Estate Funding Ltd./Guggenheim Structured Real Estate Funding LLC Series 2005-2A:

Class D, 6.87% 8/26/30 (c)(e)

550,000

548,570

Class E, 7.32% 8/26/30 (c)(e)

1,055,000

1,056,055

Home Equity Asset Trust Series 2006-3N Class B, 6.5% 8/27/36 (c)

990,000

247,500

Lenox Ltd. Series 2007-1 5.36% 4/12/37 (c)(e)

1,865,000

1,727,400

Long Beach Asset Holdings Corp. Series 2006-4 Class N1, 5.877% 6/25/46 (c)

921,399

832,714

Merit Securities Corp. Series 13 Class M1, 8.63% 12/28/33

1,665,000

1,456,875

Park Place Securities NIMS Trust Series 2004-WCW1, 5.65% 9/25/34 (c)

45,958

45,039

Park Place Securities, Inc.:

Series 2004-WHQ2 Class M10, 7.82% 2/25/35 (c)(e)

1,943,000

1,592,406

Series 2005-WHQ1 Class M10, 7.82% 3/25/35 (c)(e)

1,665,000

1,425,051

Residential Asset Securities Corp. Series 2003-KS10 Class MI3, 6.41% 12/25/33

727,803

709,490

Structured Asset Securities Corp. Series 2006-BC1 Class B1, 7.82% 3/25/36 (c)(e)

300,000

150,000

Taberna Preferred Funding III Ltd. Series 2005-3A:

Class D, 8.0056% 2/5/36 (c)(e)

1,960,000

1,827,700

Class E, 9.8556% 2/5/36 (c)(e)

500,000

465,750

Principal
Amount (b)

Value

Taberna Preferred Funding VI Ltd. Series 2006-6A Class F1, 9.8556% 12/5/36 (c)(e)

$ 2,978,395

$ 2,829,475

TIAA Real Estate CDO Ltd./TIAA Real Estate CDO Corp. Series 2002-1A Class IV, 6.84% 5/22/37 (c)

1,460,000

1,453,620

TOTAL ASSET-BACKED SECURITIES

(Cost $54,391,773)

52,690,606

Collateralized Mortgage Obligations - 9.4%

Private Sponsor - 8.8%

Banc of America Large Loan, Inc. floater Series 2003-BBA2 Class L, 9.27% 11/15/15 (c)(e)

2,905,000

2,887,796

Countrywide Home Loans, Inc. Series 2005-R3:

Class B3, 5.5% 9/25/35 (c)(e)

656,888

346,582

Class B4, 5.5% 9/25/35 (c)(e)

558,888

138,863

Class B5, 5.5% 9/25/35 (c)(e)

644,387

25,775

Countrywide Home Loans, Inc.:

Series 2002-R1:

Class B3, 6.61% 7/25/32 (c)(e)

837,391

553,556

Class B4, 6.61% 7/25/32 (c)(e)

1,677,366

708,656

Class B5, 6.61% 7/25/32 (c)(e)

301,691

9,051

Series 2002-R2 Class 2B4, 6.0918% 7/25/33 (c)(e)

131,933

55,316

Series 2002-R3:

Class B3, 5.75% 8/25/43 (c)

768,847

514,207

Class B4, 5.75% 8/25/43 (c)

437,412

199,263

Class B5, 5.75% 8/25/43 (c)

446,622

22,331

Series 2003-40:

Class B3, 4.5% 10/25/18 (c)

203,085

176,657

Class B4, 4.5% 10/25/18 (c)

81,234

59,590

Class B5, 4.5% 10/25/18 (c)

276,234

77,726

Series 2003-50:

Class B4, 5% 11/25/18 (c)

245,299

195,390

Class B5, 5% 11/25/18 (c)

245,299

95,318

Series 2003-R1:

Class 2B4, 6.1004% 2/25/43 (c)(e)

103,712

44,907

Class 2B5, 6.1004% 2/25/43 (c)(e)

404,821

51,244

Series 2003-R2 Class B3, 5.5% 5/25/43 (c)

733,687

427,144

Series 2003-R3 Class B3, 5.5% 11/25/33 (c)

695,367

316,469

Series 2004-R1:

Class 1B3, 5.5% 11/25/34 (c)(e)

1,021,634

285,036

Class 1B4, 5.5% 11/25/34 (c)(e)

382,800

19,140

Collateralized Mortgage Obligations - continued

Principal
Amount (b)

Value

Private Sponsor - continued

Credit Suisse First Boston Mortgage Acceptance Corp. Series 2004-6 Class B4, 4.7564% 9/25/19 (c)(e)

$ 172,476

$ 144,936

Credit Suisse First Boston Mortgage Securities Corp.:

Series 2002-26:

Class 4B3, 7% 10/25/17

297,202

295,628

Class 4B4, 7% 10/25/17 (c)

89,356

85,525

Class 4B5, 7% 10/25/17 (c)

155,646

108,099

Class 4B6, 7% 10/25/17 (c)

68,349

10,252

Series 2004-5:

Class CB5, 5.0643% 8/25/19 (c)(e)

167,189

117,973

Class CB6, 5.0643% 8/25/19 (c)(e)

110,908

35,491

Series 2005-10 Class CB5, 5.1932% 11/25/20 (c)(e)

292,647

193,111

Series 2005-2 Class CB4, 5.2174% 3/25/35 (c)(e)

706,484

526,639

Diversified REIT Trust:

Series 1999-1A:

Class F, 6.78% 3/18/11 (c)(e)

1,936,600

1,955,000

Class G, 6.78% 3/18/11 (c)(e)

2,425,400

2,420,154

Class H, 6.78% 3/18/11 (c)(e)

1,390,000

1,362,864

Series 2000-1A:

Class F, 6.971% 3/8/10 (c)

1,170,000

1,193,536

Class G, 6.971% 3/8/10 (c)

1,335,000

1,345,005

Class H, 6.971% 3/8/10 (c)

1,835,000

1,814,672

GMAC Commercial Mortgage Securities, Inc. Series 1993-C3 Class L, 6.974% 8/15/36 (c)

3,836,000

1,344,998

GMAC Mortgage Loan Trust Series 2003-J4 Class B1, 4.75% 9/25/18 (c)

243,168

207,529

Nomura Asset Acceptance Corp. Series 2001-R1A:

Class B1, 7% 2/19/30 (c)

546,821

551,544

Class B2, 7% 2/19/30 (c)

468,704

469,288

Class B4, 7% 2/19/30 (c)

39,186

1,959

RESI Finance LP Series 2006-B Class B6, 7.02% 6/15/38 (c)(e)

1,172,812

1,172,812

RESI Finance LP/RESI Finance DE Corp. floater:

Series 2003-B Class B9, 17.27% 7/10/35 (c)(e)

1,624,507

1,734,161

Series 2005-A Class B6, 7.32% 3/10/37 (c)(e)

774,283

774,283

Residential Funding Securities Corp. Series 2002-RM1 Class BI2, 5.5% 12/25/17 (c)

162,467

140,412

Principal
Amount (b)

Value

RESIX Finance Ltd. floater:

Series 2003-D Class B9, 16.82% 12/10/35 (c)(e)

$ 467,721

$ 496,953

Series 2004-A:

Class B7, 9.57% 2/10/36 (c)(e)

475,652

489,921

Class B9, 14.32% 2/10/36 (c)(e)

774,361

813,079

Series 2004-B:

Class B8, 10.07% 2/10/36 (c)(e)

396,288

408,177

Class B9, 13.57% 2/10/36 (c)(e)

672,546

704,492

Series 2004-C:

Class B7, 8.82% 9/10/36 (c)(e)

2,019,369

2,049,660

Class B8, 9.57% 9/10/36 (c)(e)

1,798,200

1,802,695

Class B9, 12.32% 9/10/36 (e)

673,123

696,682

Series 2005-A:

Class B10, 13.82% 3/10/37 (c)(e)

483,927

491,186

Class B7, 8.32% 3/10/37 (c)(e)

1,451,781

1,451,781

Class B9, 11.07% 3/10/37 (c)(e)

1,686,001

1,686,001

Series 2005-B:

Class B7, 8.42% 6/10/37 (c)(e)

1,732,604

1,732,604

Class B8, 9.22% 6/10/37 (c)(e)

596,786

596,786

Class B9, 11.07% 6/10/37 (c)(e)

577,535

577,535

Series 2005-C:

Class B7, 8.42% 9/10/37 (c)(e)

1,796,737

1,796,737

Class B8, 9.07% 9/10/37 (c)(e)

1,038,006

1,038,006

Class B9, 11.02% 9/10/37 (c)(e)

1,699,088

1,699,088

Series 2005-D:

Class B7, 9.57% 12/15/37 (c)(e)

1,652,649

1,685,702

Class B8, 11.07% 12/15/37 (c)(e)

1,361,005

1,384,823

Series 2006-A:

Class B7, 8.82% 3/15/38 (c)(e)

1,058,444

1,058,444

Class B8, 9.17% 3/15/38 (c)(e)

679,373

679,373

Class B9, 10.82% 3/15/38 (c)(e)

423,377

423,377

Series 2006-B Class B7, 9.17% 7/15/38 (c)(e)

1,212,569

1,212,569

Collateralized Mortgage Obligations - continued

Principal
Amount (b)

Value

Private Sponsor - continued

RESIX Finance Ltd. floater: - continued

Series 2007-A Class B10, 10.07% 2/15/39 (c)(e)

$ 1,597,436

$ 1,589,448

Wells Fargo Mortgage Backed Securities Trust Series 2003-3 Class 2B4, 5.25% 4/25/33 (c)

394,684

375,284

TOTAL PRIVATE SPONSOR

52,156,291

U.S. Government Agency - 0.6%

Fannie Mae REMIC Trust:

Series 2001-W3 subordinate REMIC pass thru certificates:

Class B3, 7% 9/25/41 (g)

762,400

586,405

Class B4, 7% 9/25/41 (g)

417,525

241,500

Class B5, 7% 9/25/41 (g)

689,365

48,256

Series 2002-W1 subordinate REMIC pass thru certificates:

Class 3B3, 5.9794% 2/25/42 (c)(e)

161,440

109,404

Class 3B5, 5.9794% 2/25/42 (c)(e)

153,423

18,823

Class B4, 6% 2/25/42 (c)

1,133,275

437,022

Class B5, 6% 2/25/42 (c)

186,157

5,585

Series 2002-W6 subordinate REMIC pass thru certificates, Class 3B4, 6.0948% 1/25/42 (c)(e)

130,082

66,778

Series 2003-W1 subordinate REMIC pass thru certificates:

Class B3, 5.75% 12/25/42 (g)

2,338,183

1,508,818

Class B4, 5.75% 12/25/42 (g)

1,430,690

588,668

Class B5, 5.75% 12/25/42 (g)

1,082,282

54,114

Series 2003-W10 subordinate REMIC pass thru certificates:

Class 2B4, 6.0341% 6/25/43 (e)(g)

377,880

138,773

Class 2B5, 6.0341% 6/25/43 (e)(g)

384,516

47,575

TOTAL U.S. GOVERNMENT AGENCY

3,851,721

TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS

(Cost $59,466,347)

56,008,012

Commercial Mortgage Securities - 60.0%

Artesia Mortgage CMBS, Inc. floater Series 1998-C1 Class F, 6.8994% 6/25/30 (c)(e)

4,513,000

4,579,931

Asset Securitization Corp.:

Series 1996-D2 Class B1A, 8.7706% 2/14/29 (c)(e)

1,895,000

1,996,264

Principal
Amount (b)

Value

Series 1997-D4:

Class B2, 7.525% 4/14/29

$ 675,000

$ 719,915

Class B5, 7.525% 4/14/29

4,476,925

4,274,064

Series 1997-MD7:

Class A3, 7.9667% 1/13/30 (e)

1,449,210

1,482,270

Class A4, 8.1667% 1/13/30 (e)

1,018,285

1,011,912

Banc of America Commercial Mortgage, Inc.:

Series 2003-2:

Class BWF, 7.55% 10/11/37 (c)

1,250,732

1,386,084

Class BWG, 8.155% 10/11/37 (c)

998,160

1,137,378

Class BWH, 9.073% 10/11/37 (c)

306,869

364,223

Class BWJ, 9.99% 10/11/37 (c)

509,120

628,395

Class BWK, 10.676% 10/11/37 (c)

678,050

860,932

Class BWL, 10.1596% 10/11/37 (c)

1,463,289

1,818,922

Series 2004-4:

Class K, 4.637% 7/10/42 (c)(e)

1,650,000

1,335,727

Class L, 4.637% 7/10/42 (c)(e)

1,690,000

1,193,299

Series 2005-4 Class H, 5.3254% 7/10/45 (c)(e)

525,000

462,108

Banc of America Large Loan, Inc. floater:

Series 2003-BBA2 Class K, 7.92% 11/15/15 (c)(e)

1,047,439

1,056,990

Series 2005-ESHA Class K, 7.12% 7/14/08 (c)(e)

3,950,000

3,950,395

Series 2005-MIB1 Class K, 7.32% 3/15/22 (c)(e)

2,310,000

2,313,439

Bear Stearns Commercial Mortgage Securities Trust Series 2007-BBA8 Class L, 7.22% 3/15/22 (c)(e)

1,965,000

1,965,000

Bear Stearns Commercial Mortgage Securities, Inc.:

Series 1998-C1 Class F, 6% 6/16/30 (c)

600,000

601,001

Series 1999-C1 Class H, 5.64% 2/14/31 (c)

1,475,030

1,336,687

Beckman Coulter, Inc. sequential pay Series 2000-A Class A, 7.4975% 12/15/18 (c)

4,696,000

4,954,191

Berkeley Federal Bank & Trust FSB Series 1994-1 Class B, 4.5651% 8/1/24 (c)(e)

140,010

128,110

BKB Commercial Mortgage Trust weighted average coupon Series 1997-C1 Class H, 5.8627% 10/25/22 (c)(e)

96,410

48,205

Commercial Mortgage Securities - continued

Principal
Amount (b)

Value

Chase Commercial Mortgage Securities Corp.:

Series 1998-1:

Class F, 6.56% 5/18/30 (c)

$ 2,500,000

$ 2,567,861

Class H, 6.34% 5/18/30 (c)

2,000,000

1,693,020

Series 1998-2 Class J, 6.39% 11/18/30 (c)

2,447,000

924,507

Chase Manhattan Bank-First Union National Bank Commercial Mortgage Trust Series 1999-1 Class G, 6.4% 8/15/31 (c)

4,000,000

4,066,240

Commercial Mortgage Asset Trust:

Series 1999-C1 Class F, 6.25% 1/17/32 (c)

5,380,000

5,484,455

Series 1999-C2:

Class G, 6% 11/17/32

4,575,000

4,603,228

Class H, 6% 11/17/32

4,372,000

4,382,537

Commercial Mortgage pass thru certificates:

Series 2001-J1A Class F, 6.958% 2/14/34 (c)

1,480,000

1,548,808

Series 2001-J2A Class F, 7.1575% 7/16/34 (c)(e)

1,520,000

1,610,139

Credit Suisse First Boston Mortgage Securities Corp.:

floater Series 1997-C2 Class H, 7.46% 1/17/35 (c)(e)

3,190,000

2,313,503

Series 1998-C1:

Class F, 6% 5/17/40 (c)

12,000,000

11,394,876

Class H, 6% 5/17/40 (c)

3,600,000

1,791,000

Series 1998-C2:

Class F, 6.75% 11/11/30 (c)

4,000,000

4,222,148

Class G, 6.75% 11/11/30 (c)

1,065,000

1,107,361

Series 2001-CK6 Class NW, 6.08% 8/15/36 (g)

2,011,892

1,243,935

Series 2002-CKP1 Class KZ, 6.294% 12/15/35 (c)(e)

6,026,000

5,792,963

Series 2003-C3 Class J, 4.231% 5/15/38 (c)

2,400,000

2,130,026

Series 2004-CBN1 Class A, 10.633% 8/15/08 (c)

2,135,380

2,085,604

Series 2004-TF2A Class AX, 0% 11/15/19 (c)(e)(f)

3,186,451

6,373

Credit Suisse Mortgage Capital Certificates floater Series 2007-TFL1 Class L, 7.22% 2/15/22 (c)(e)

2,385,000

2,385,000

Credit Suisse/Morgan Stanley Commercial Mortgage Trust Series 2006-HC1A Class K, 6.797% 5/15/23 (c)(e)

2,824,000

2,824,000

Crest Ltd. Series 2001-1A Class C, 9% 2/25/34 (c)

6,101,000

6,915,341

Deutsche Mortgage & Asset Receiving Corp. Series 1998-C1 Class F, 7.5% 6/15/31

3,600,000

3,844,372

Principal
Amount (b)

Value

DLJ Commercial Mortgage Corp.:

Series 1998-CF2 Class B3, 6.04% 11/12/31 (c)

$ 5,785,000

$ 5,825,310

Series 1998-CG1 Class B4, 7.3709% 6/10/31 (c)(e)

3,690,000

3,944,024

DLJ Mortgage Acceptance Corp. Series 1996-CF1 Class B4, 8.3515% 3/13/28 (e)

2,105,000

2,221,437

First Chicago/Lennar Trust I weighted average coupon Series 1997-CHL1 Class E, 7.7188% 4/29/39 (c)(e)

3,547,220

3,599,597

First Union National Bank Commercial Mortgage Trust sequential pay Series 1999-C4 Class G, 6.5% 12/15/31 (c)

3,700,000

3,790,286

GE Commercial Mortgage Corp. Series 2005-C3 Class J, 5.2747% 7/10/45 (c)(e)

2,277,000

2,024,907

Global Signal Trust II Series 2004-2A:

Class D, 5.093% 12/15/14 (c)

5,000,000

4,827,000

Class F, 6.376% 12/15/14 (c)

2,220,000

2,178,367

Global Signal Trust III Series 2006-1 Class F, 7.036% 2/15/36

1,576,000

1,579,597

GMAC Commercial Mortgage Securities, Inc.:

Series 1997-C2:

Class E, 7.624% 4/15/29 (e)

1,745,000

1,761,087

Class F, 6.75% 4/15/29 (e)

7,131,000

7,315,960

Class H, 6.6803% 4/15/29 (e)

6,995,714

2,238,628

Series 1999-C1 Class F, 6.02% 5/15/33 (c)

7,100,000

7,118,133

Series 1999-C2I Class K, 6.481% 9/15/33

7,875,000

4,508,438

Series 1999-C3:

Class J, 6.974% 8/15/36 (c)

2,788,000

2,741,388

Class K, 6.974% 8/15/36 (c)

5,260,000

4,247,450

Series 2000-C1 Class K, 7% 3/15/33 (c)

2,473,000

2,267,046

Series 2003-J10 Class B2, 6.75% 4/15/29 (e)

4,000,000

3,946,719

Greenwich Capital Commercial Funding Corp.:

Series 2003-C2 Class J, 5.234% 11/5/13 (c)(e)

3,210,000

3,066,893

Series 2005-GG3:

Class J, 4.685% 8/10/42 (c)(e)

900,000

777,829

Class K, 4.685% 8/10/42 (c)(e)

1,700,000

1,422,688

GS Mortgage Securities Corp. II:

Series 1997-GL Class H, 7.9998% 7/13/30 (c)(e)

3,736,000

4,162,198

Series 1998-GLII Class G, 7.1908% 4/13/31 (c)(e)

2,083,000

2,173,773

Commercial Mortgage Securities - continued

Principal
Amount (b)

Value

GS Mortgage Securities Corp. II: - continued

Series 2004-GG2:

Class J, 5.067% 8/1/38 (c)(e)

$ 420,000

$ 377,677

Class K, 5.067% 8/1/38 (c)(e)

720,000

628,927

Series 2006-RR2:

Class M, 5.8117% 6/1/46 (c)(e)

727,000

509,074

Class N, 5.8117% 6/1/46 (c)(e)

160,000

102,392

J.P. Morgan Commercial Mortgage Finance Corp.:

Series 1997-C5 Class F, 7.5605% 9/15/29

5,000,000

5,370,942

Series 1999-C7:

Class G, 6% 10/15/35 (c)

13,273,000

13,156,649

Class H, 6% 10/15/35 (c)

1,991,000

1,950,991

Class NR, 6% 10/15/35 (c)

6,090,987

3,350,043

Series 1999-C8:

Class G, 6% 7/15/31 (c)

1,075,000

1,057,865

Class H, 6% 7/15/31 (c)

2,045,000

1,895,470

Series 2000-C9 Class G, 6.25% 10/15/32 (c)

1,880,000

1,886,365

JPMorgan Chase Commercial Mortgage Securities Corp.:

Series 2001-A:

Class G, 6% 10/15/32 (c)(e)

2,003,000

1,953,546

Class NR, 6% 10/15/32 (c)(e)

2,060,685

1,277,625

Class X, 1.8768% 10/15/32 (c)(e)(f)

25,988,245

563,035

Series 2003-CB7 Class L, 5.173% 1/12/38 (c)(e)

4,096,000

3,232,000

Series 2005-PRKS Class A, 10.075% 1/15/15 (c)(e)

2,290,000

2,319,999

LB Commercial Conduit Mortgage Trust:

Series 1998-C1 Class K, 6.3% 2/18/30 (c)

2,483,000

648,319

Series 1998-C4 Class G, 5.6% 10/15/35 (c)

1,510,000

1,490,438

LB Multi-family Mortgage Trust Series 1991-4 Class A1, 7.125% 4/25/21 (c)(e)

447,568

402,811

LB-UBS Commercial Mortgage Trust:

Series 2001-C7:

Class M, 5.868% 11/15/33

4,957,000

4,610,785

Class P, 5.868% 11/15/33

1,320,000

1,067,344

Series 2002-C1 Class K, 6.428% 3/15/34 (c)

3,751,000

3,758,519

Series 2002-C2 Class M, 5.683% 7/15/35 (c)

950,000

927,586

Mach One Trust LLC Series 2004-1A:

Class L, 5.45% 5/28/40 (c)(e)

1,393,000

1,030,707

Class M, 5.45% 5/28/40 (c)(e)

1,533,000

962,259

Principal
Amount (b)

Value

Merrill Lynch Financial Asset, Inc.:

sequential pay Series 2002-CAN8 Class A1, 4.83% 11/12/34

CAD

75,123

$ 70,118

Series 2005-CA16:

Class F, 4.384% 7/12/15

CAD

551,000

440,142

Class G, 4.384% 7/12/15

CAD

275,000

212,677

Class H, 4.384% 7/12/15

CAD

184,000

125,681

Class J, 4.384% 7/12/15

CAD

275,000

173,781

Class K, 4.384% 7/12/15

CAD

275,000

163,453

Class L, 4.384% 7/12/15

CAD

184,000

102,952

Class M, 4.384% 7/12/15

CAD

772,000

298,174

Series 2005-CA17:

Class E, 4.9735% 11/12/37 (e)

CAD

474,000

406,030

Class F, 4.525% 11/12/37 (e)

CAD

812,000

634,120

Class G, 4.525% 11/12/37 (e)

CAD

846,000

642,627

Class H, 4.525% 11/12/37 (e)

CAD

235,000

160,474

Class J, 4.525% 11/12/37 (e)

CAD

248,000

153,473

Class K, 4.525% 11/12/37 (e)

CAD

261,000

148,320

Class L, 4.525% 11/12/37 (e)

CAD

248,000

131,829

Class M, 4.525% 11/12/37 (e)

CAD

2,057,000

752,194

Merrill Lynch Mortgage Investors, Inc.:

Series 1997-C2 Class F, 6.25% 12/10/29 (e)

2,350,000

2,304,744

Series 1999-C1 Class G, 6.71% 11/15/31 (c)

2,604,000

2,365,968

Merrill Lynch Mortgage Trust:

Series 2002-MW1:

Class H, 5.695% 7/12/34 (c)

1,975,000

1,909,689

Class J, 5.695% 7/12/34 (c)

700,000

681,039

Series 2004-KEY2:

Class J, 5.091% 8/12/39 (c)(e)

1,869,000

1,748,109

Class K, 5.091% 8/12/39 (c)(e)

1,482,000

1,287,352

Series 2006-KEY2 Class L, 5.091% 8/12/39 (c)

1,370,000

1,114,486

Mezz Capital Commercial Mortgage Trust:

Series 2004-C1:

Class F, 9.422% 10/15/13 (c)

645,000

672,514

Class G, 12.349% 10/15/13 (c)

465,000

484,072

Class X, 8.0472% 1/15/18 (e)(f)

956,286

312,922

Series 2004-C2:

Class D, 7.347% 10/15/40 (c)

1,074,000

1,031,119

Class E, 8.309% 10/15/40 (c)

441,000

423,676

Class F, 10.223% 10/15/40 (c)

772,000

751,744

Class G, 12.933% 10/15/40 (c)

497,000

476,538

Commercial Mortgage Securities - continued

Principal
Amount (b)

Value

Mezz Capital Commercial Mortgage Trust: - continued

Series 2005-C3:

Class D, 7.7% 5/20/44 (c)

$ 1,039,000

$ 999,765

Class E, 8.757% 5/20/44 (c)

738,000

714,707

Class F, 10.813% 5/20/44 (c)

479,000

467,903

Class G, 10% 5/20/44 (c)

673,000

552,412

Morgan Stanley Capital I, Inc.:

Series 1997-RR Class G1, 7.5892% 4/30/39 (c)(e)

4,611,957

621,138

Series 1998-CF1 Class F, 7.35% 7/15/32 (c)

2,020,000

1,999,692

Series 1998-HF2:

Class F, 6.01% 11/15/30 (c)

5,935,000

5,966,155

Class G, 6.01% 11/15/30 (c)

8,985,745

9,068,496

Series 1999-CAM1:

Class M, 6.54% 3/15/32 (c)

2,106,170

1,263,702

Class N, 6.54% 3/15/32 (c)

293,786

47,006

Morgan Stanley Dean Witter Capital I Trust Series 2000-LIFE Class H, 6.5% 11/15/36 (c)

773,000

773,242

Mortgage Capital Funding, Inc. Series 1997-MC2 Class F, 7.214% 11/20/27 (c)

9,381,364

9,404,467

NationsLink Funding Corp.:

Series 1998-2:

Class F, 7.105% 8/20/30 (c)

6,500,000

6,595,586

Class G, 5% 8/20/30 (c)

1,315,000

1,184,734

Series 1999-1 Class H, 6% 1/20/31 (c)

1,340,000

1,316,941

Nomura Asset Securities Corp. Series 1998-D6 Class B1, 6% 3/15/30 (c)

7,453,000

7,630,223

Penn Mutual Life Insurance Co./Penn Insurance & Annuity Co. floater Series 1996-PML Class M, 7.9% 11/15/26 (c)

5,862,000

6,034,287

Prudential Securities Secured Financing Corp.:

Series 1998-C1 Class F, 6.9872% 2/15/13 (c)(e)

3,765,000

3,913,088

Series 1999-NRF1 Class F, 6.074% 11/1/31 (c)

4,130,000

4,073,123

Real Estate Asset Liquidity Trust:

Series 2006-2:

Class F, 4.456% 4/12/17 (c)

CAD

1,170,000

889,920

Class G, 4.456% 4/12/17 (c)

CAD

585,000

431,668

Class H, 4.456% 4/12/17 (c)

CAD

390,000

251,654

Class J, 4.456% 4/12/17 (c)

CAD

390,000

233,190

Class K, 4.456% 4/12/18 (c)

CAD

195,000

102,747

Class L, 4.456% 4/12/18 (c)

CAD

281,000

142,503

Class M, 4.456% 4/12/18 (c)

CAD

1,413,000

503,392

Series 2007-1:

Class F, 4.57% 4/12/17

CAD

1,515,000

1,202,948

Class G, 4.57% 4/12/17

CAD

505,000

384,838

Class H, 4.57% 4/12/17

CAD

505,000

339,761

Principal
Amount (b)

Value

Class J, 4.57% 4/12/17

CAD

505,000

$ 310,777

Class K, 4.57% 4/12/17

CAD

253,000

142,713

Class L, 4.57% 4/12/17

CAD

757,000

411,899

Class M, 4.57% 4/12/18

CAD

2,222,418

842,563

RMF Commercial Mortgage, Inc. Series 1997-1 Class G, 9.01% 1/15/19 (a)(c)(e)

399,513

0

Salomon Brothers Mortgage Securities VII, Inc.:

floater:

Series 1999-C1 Class H, 7% 5/18/32 (c)(e)

2,500,000

2,645,024

Series 2000-NL1 Class H, 7.1363% 10/15/30 (c)(e)

2,900,000

2,902,266

Series 2001-MMA:

Class E6, 6.5% 2/18/34 (c)(e)

2,150,000

2,086,454

Class F6, 6.5% 2/18/34 (c)(e)

475,000

447,929

SBA CMBS Trust Series 2006-1A Class J, 7.825% 11/15/36 (c)

1,105,000

1,090,842

TERRA LNR I Series 2006-G, 7.29% 6/15/17 (c)(e)

475,743

463,283

Wachovia Bank Commercial Mortgage Trust Series 2004-C15 Class 175C, 6.0432% 10/15/41 (c)(e)

1,250,000

1,105,887

Wachovia Ltd./Wachovia LLC Series 2006-1 Class 1Ml, 10.8463% 9/25/26 (c)(e)

4,815,000

4,578,102

Washington Mutual Multi-family Mortgage LLC Series 2001-1 Class B4, 7.1928% 10/18/31 (c)(e)

5,163,000

5,397,688

TOTAL COMMERCIAL MORTGAGE SECURITIES

(Cost $325,826,513)

356,527,594

Common Stocks - 0.1%

Shares

Homebuilding/Real Estate - 0.1%

Annaly Capital Management, Inc.
(Cost $592,650)

43,900

677,816

Preferred Stocks - 6.3%

Convertible Preferred Stocks - 0.2%

Healthcare - 0.2%

Health Care REIT, Inc. 7.50%

40,000

1,278,400

Nonconvertible Preferred Stocks - 6.1%

Banks and Thrifts - 0.3%

MFH Financial Trust I 9.50% (c)

16,845

1,738,404

Diversified Financial Services - 0.3%

Lexington Realty Trust 7.55%

20,000

499,400

Realty Income Corp. 6.75%

50,000

1,252,500

1,751,900

Preferred Stocks - continued

Shares

Value

Nonconvertible Preferred Stocks - continued

Homebuilding/Real Estate - 4.7%

American Home Mortgage Investment Corp. Series B, 9.25%

2,900

$ 71,485

Annaly Capital Management, Inc. Series A, 7.875%

97,120

2,500,840

Anthracite Capital, Inc.:

Series C, 9.375%

5,830

150,123

Series D, 8.25%

45,000

1,118,250

Anworth Mortgage Asset Corp. Series A, 8.625%

49,000

1,227,450

Apartment Investment & Management Co.:

Series G, 9.375%

16,500

428,340

Series T, 8.00%

103,000

2,625,470

Series U, 7.75%

16,000

407,200

CBL & Associates Properties, Inc. Series B, 8.75%

6,300

319,158

Cedar Shopping Centers, Inc. 8.875%

46,400

1,205,472

CenterPoint Properties Trust Series D, 5.377%

2,775

2,324,063

Developers Diversified Realty Corp. (depositary shares) Series G, 8.00%

107,000

2,708,170

Hersha Hospitality Trust Series A, 8.00%

38,676

993,973

iStar Financial, Inc. Series I, 7.50%

30,000

744,000

Mid-America Apartment Communities, Inc. Series H, 8.30%

103,000

2,638,860

PS Business Parks, Inc. (depositary shares) Series L, 7.60%

44,000

1,124,640

RAIT Investment Trust:

Series A, 7.75%

25,900

636,622

Series B, 8.375%

26,505

662,625

Strategic Hotel & Resorts, Inc.:

Series B, 8.25%

88,000

2,239,600

Series C, 8.25%

22,820

585,333

Taubman Centers, Inc. Series G, 8.00%

40,000

1,030,000

The Mills Corp.:

Series B, 9.00%

100

2,600

Series C, 9.00%

25,580

665,080

Series E, 8.75%

59,450

1,545,700

27,955,054

Hotels - 0.4%

FelCor Lodging Trust, Inc. (depositary shares) Series C, 8.00%

40,000

1,000,000

Innkeepers USA Trust Series C, 8.00%

35,000

766,500

Red Lion Hotels Capital Trust 9.50%

29,250

782,438

2,548,938

Services - 0.4%

Public Storage, Inc. Series M, 6.625%

81,000

1,995,840

TOTAL NONCONVERTIBLE PREFERRED STOCKS

35,990,136

TOTAL PREFERRED STOCKS

(Cost $36,589,417)

37,268,536

Floating Rate Loans - 3.8%

Principal
Amount (b)

Value

Diversified Financial Services - 0.8%

EOP Operating LP term loan 7.97% 2/28/09 (e)

$ 36,082

$ 36,082

LandSource Communities Development LLC:

Tranche 2LN, term loan 9.86% 2/27/14 (e)

2,750,000

2,780,938

Tranche B 1LN, term loan 8.1099% 2/27/13 (e)

1,885,275

1,897,058

4,714,078

Homebuilding/Real Estate - 1.8%

Capital Automotive (REIT) Tranche B, term loan 7.07% 12/16/10 (e)

2,930,263

2,952,240

General Growth Properties, Inc. Tranche A1, term loan 6.57% 2/24/10 (e)

4,114,474

4,114,474

MDS Realty Holdings LLC:

Tranche M1, term loan 7.57% 1/8/08 (e)

1,138,326

1,138,326

Tranche M3, term loan 8.82% 1/8/08 (e)

1,241,810

1,241,810

Tishman Speyer Properties term loan 7.07% 12/27/12 (e)

1,410,000

1,413,525

10,860,375

Leisure - 0.6%

Intrawest Resorts term loan 7.478% 10/25/07 (e)

3,376,593

3,380,814

Super Retail - 0.6%

The Pep Boys - Manny, Moe & Jack term loan 7.36% 10/27/13 (e)

59,850

60,224

Toys 'R' US, Inc. term loan 8.32% 12/9/08 (e)

3,500,000

3,526,250

3,586,474

Telecommunications - 0.0%

Crown Castle International Corp. Tranche B, term loan 6.89% 3/6/14 (e)

160,000

160,200

TOTAL FLOATING RATE LOANS

(Cost $22,599,539)

22,701,941

Preferred Securities - 2.2%

Diversified Financial Services - 1.0%

Cairn High Grade ABS CDO PLC Series 2006-2A Class SUB, 1/13/47 (c)

1,100,000

1,023,000

Harp High Grade CDO I Ltd. Series 2006-1, 7/8/46 (c)

2,140,000

1,701,300

Ipswich Street CDO Series 2006-1, 6/27/46 (c)

2,515,000

2,137,750

Kent Funding III Ltd. 11/5/47 (c)

1,100,000

913,000

5,775,050

Preferred Securities - continued

Principal
Amount (b)

Value

Homebuilding/Real Estate - 1.2%

Crest Clarendon Street 2002-1 Ltd. Series 2002-1A Class PS, 12/28/35 (c)

$ 3,000,000

$ 2,978,700

Crest Dartmouth Street 2003 1 Ltd.
Series 2003-1A Class PS, 6/28/38 (c)

2,730,000

3,107,832

Crest G-Star Ltd. Series 2001-2A
Class PS, 2/25/32 (c)

1,100,000

1,047,750

7,134,282

TOTAL PREFERRED SECURITIES

(Cost $13,491,370)

12,909,332

Cash Equivalents - 1.0%

Maturity
Amount

Investments in repurchase agreements in a joint trading account at 5.08%, dated 5/31/07 due 6/1/07 (Collateralized by U.S. Treasury Obligations) #
(Cost $6,143,000)

$ 6,143,866

6,143,000

TOTAL INVESTMENT PORTFOLIO - 99.7%

(Cost $565,935,708)

592,262,719

NET OTHER ASSETS - 0.3%

2,073,431

NET ASSETS - 100%

$ 594,336,150

Currency Abbreviation

CAD

-

Canadian dollar

Legend

(a) Non-income producing - Issuer is in default.

(b) Principal amount is stated in United States dollars unless otherwise noted.

(c) Security exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be resold in transactions exempt from registration, normally to qualified institutional buyers. At the end of the period, the value of these securities amounted to $416,885,251 or 70.1% of net assets.

(d) Partial interest payment received on the last interest payment date.

(e) The coupon rate shown on floating or adjustable rate securities represents the rate at period end.

(f) Security represents right to receive monthly interest payments on an underlying pool of mortgages or assets. Principal shown is the outstanding par amount of the pool held as of the end of the period.

(g) Restricted securities - Investment in securities not registered under the Securities Act of 1933 (excluding 144A issues). At the end of the period, the value of restricted securities (excluding 144A issues) amounted to $4,458,044 or 0.8% of net assets.

Additional information on each holding is as follows:

Security

Acquisition Date

Acquisition Cost

Credit Suisse First Boston Mortgage Securities Corp. Series 2001-CK6 Class NW, 6.08% 8/15/36

7/1/02

$ 1,048,063

Fannie Mae REMIC Trust:

Series 2001-W3 subordinate REMIC pass thru certificates:

Class B3, 7% 9/25/41

5/21/03

$ 791,172

Class B4, 7% 9/25/41

11/2/01

$ 232,500

Class B5, 7% 9/25/41

11/2/01

$ 452,079

Series 2003-W1 subordinate REMIC pass thru certificates:
Class B3, 5.75% 12/25/42

3/25/03

$ 1,902,824

Class B4, 5.75% 12/25/42

3/25/03

$ 822,713

Class B5, 5.75% 12/25/42

3/25/03

$ 556,242

Series 2003-W10 subordinate REMIC pass thru certificates:
Class 2B4, 6.0341% 6/25/43

9/29/03

$ 168,529

Class 2B5, 6.0341% 6/25/43

9/29/03

$ 66,097

# Additional Information on each counterparty to the repurchase agreement is as follows:

Repurchase Agreement / Counterparty

Value

$6,143,000 due 6/01/07 at 5.08%

BNP Paribas Securities Corp.

$ 1,129,670

Goldman, Sachs & Co.

1,509,390

Merrill Lynch Government Securities, Inc.

2,695,338

Mizuho Securities USA, Inc.

808,602

$ 6,143,000

See accompanying notes which are an integral part of the financial statements.

Semiannual Report

Financial Statements

Statement of Assets and Liabilities

May 31, 2007

Assets

Investment in securities, at value (including repurchase agreements of $6,143,000) -
See accompanying schedule:

Unaffiliated issuers (cost $565,935,708)

$ 592,262,719

Cash

144,827

Receivable for investments sold

1,087,689

Dividends receivable

148,866

Interest receivable

3,839,030

Prepaid expenses

1,527

Total assets

597,484,658

Liabilities

Payable for investments purchased

$ 2,277,078

Distributions payable

382,077

Accrued management fee

356,009

Other affiliated payables

30,859

Other payables and accrued expenses

102,485

Total liabilities

3,148,508

Net Assets

$ 594,336,150

Net Assets consist of:

Paid in capital

$ 555,552,905

Undistributed net investment income

6,451,512

Accumulated undistributed net realized gain (loss) on investments and foreign currency transactions

6,008,221

Net unrealized appreciation (depreciation) on investments and assets and liabilities in foreign currencies

26,323,512

Net Assets, for 54,122,110 shares outstanding

$ 594,336,150

Net Asset Value, offering price and redemption price per share ($594,336,150 ÷ 54,122,110 shares)

$ 10.98

Statement of Operations

Six months ended May 31, 2007

Investment Income

Dividends

$ 2,551,119

Interest (including $36,761 from affiliated interfund lending)

23,450,568

Total income

26,001,687

Expenses

Management fee

$ 2,188,682

Transfer agent fees

45,816

Accounting fees and expenses

141,628

Custodian fees and expenses

12,452

Independent trustees' compensation

989

Registration fees

227

Audit

106,575

Legal

4,848

Miscellaneous

8,890

Total expenses before reductions

2,510,107

Expense reductions

(8,245)

2,501,862

Net investment income

23,499,825

Realized and Unrealized Gain (Loss)

Net realized gain (loss) on:

Investment securities:

Unaffiliated issuers

605,382

Foreign currency transactions

(23,749)

Total net realized gain (loss)

581,633

Change in net unrealized appreciation (depreciation) on:

Investment securities

(15,256,102)

Assets and liabilities in foreign currencies

(1,262)

Total change in net unrealized appreciation (depreciation)

(15,257,364)

Net gain (loss)

(14,675,731)

Net increase (decrease) in net assets resulting from operations

$ 8,824,094

See accompanying notes which are an integral part of the financial statements.

Semiannual Report

Financial Statements - continued

Statement of Changes in Net Assets

Six months ended
May 31,
2007

Year ended
November 30,
2006

Increase (Decrease) in Net Assets

Operations

Net investment income

$ 23,499,825

$ 48,026,771

Net realized gain (loss)

581,633

4,602,389

Change in net unrealized appreciation (depreciation)

(15,257,364)

(187,581)

Net increase (decrease) in net assets resulting from operations

8,824,094

52,441,579

Distributions to shareholders from net investment income

(28,663,671)

(46,014,040)

Distributions to shareholders from net realized gain

(1,615,201)

(5,493,149)

Total distributions

(30,278,872)

(51,507,189)

Share transactions
Proceeds from sales of shares

83,508,076

131,523,262

Reinvestment of distributions

26,742,619

44,676,310

Cost of shares redeemed

(94,227,831)

(100,823,389)

Net increase (decrease) in net assets resulting from share transactions

16,022,864

75,376,183

Total increase (decrease) in net assets

(5,431,914)

76,310,573

Net Assets

Beginning of period

599,768,064

523,457,491

End of period (including undistributed net investment income of $6,451,512 and undistributed net investment income of $11,615,358, respectively)

$ 594,336,150

$ 599,768,064

Other Information

Shares

Sold

7,511,428

11,771,428

Issued in reinvestment of distributions

2,405,013

4,002,884

Redeemed

(8,526,070)

(9,082,665)

Net increase (decrease)

1,390,371

6,691,647

Financial Highlights

Six months ended
May 31,

Years ended November 30,

2007

2006

2005

2004

2003 F

2002 F

Selected Per-Share Data

Net asset value, beginning of period

$ 11.37

$ 11.37

$ 11.43

$ 10.96

$ 10.47

$ 10.05

Income from Investment Operations

Net investment income D

.429

.958

.787

.947

.885

.937

Net realized and unrealized gain (loss)

(.264)

.090

.186

.881

.503

.409

Total from investment operations

.165

1.048

.973

1.828

1.388

1.346

Distributions from net investment income

(.525)

(.928)

(.853)

(.848)

(.828)

(.926)

Distributions from net realized gain

(.030)

(.120)

(.180)

(.510)

(.070)

-

Total distributions

(.555)

(1.048)

(1.033)

(1.358)

(.898)

(.926)

Net asset value, end of period

$ 10.98

$ 11.37

$ 11.37

$ 11.43

$ 10.96

$ 10.47

Total Return B, C

1.49%

9.80%

9.00%

18.26%

13.81%

14.05%

Ratios to Average Net Assets E

Expenses before reductions

.83% A

.82%

.82%

.82%

.83%

.84%

Expenses net of fee waivers, if any

.83% A

.82%

.82%

.82%

.83%

.84%

Expenses net of all reductions

.82% A

.82%

.82%

.81%

.81%

.83%

Net investment income

7.73% A

8.61%

7.01%

8.75%

8.25%

9.17%

Supplemental Data

Net assets, end of period (000 omitted)

$ 594,336

$ 599,768

$ 523,457

$ 405,968

$ 308,416

$ 402,365

Portfolio turnover rate

11% A

22%

18%

27%

27%

32%

A Annualized

B Total returns for periods of less than one year are not annualized.

C Total returns would have been lower had certain expenses not been reduced during the periods shown.

D Calculated based on average shares outstanding during the period.

E Expense ratios reflect operating expenses of the Fund. Expenses before reductions do not reflect amounts reimbursed by the investment adviser or reductions from brokerage service arrangements or other expense offset arrangements and do not represent the amount paid by the Fund during periods when reimbursements or reductions occur. Expenses net of fee waivers reflect expenses after reimbursement by the investment adviser but prior to reductions from brokerage service arrangements or other expense offset arrangements. Expenses net of all reductions represent the net expenses paid by the Fund.

F As the result of a correction made in the calculation of accretion of discount for certain securities, an accounting policy first adopted in the year ended November 30, 2002, amounts previously reported for that year have been reclassified. This correction had no material effect on the results of operations for the year ended November 30, 2003. The impact for 2002 is a decrease in net investment income per share of $.055 and a corresponding increase in net realized and unrealized gain. The ratio of net investment income to average net assets decreased from previously reported 9.70% to 9.17%. The reclassification has no impact on total net assets or total return of the fund.

See accompanying notes which are an integral part of the financial statements.

Semiannual Report

Notes to Financial Statements

For the period ended May 31, 2007

1. Organization.

Fidelity Real Estate High Income Fund (the Fund) is a non-diversified fund of Fidelity Advisor Series IV (the trust) and is authorized to issue an unlimited number of shares. The trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Massachusetts business trust.

2. Significant Accounting Policies.

The financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America, which require management to make certain estimates and assumptions at the date of the financial statements. The following summarizes the significant accounting policies of the Fund:

Security Valuation. Investments are valued and net asset value per share is calculated (NAV calculation) as of the close of business of the New York Stock Exchange, normally 4:00 p.m. Eastern time. Wherever possible, the Fund uses independent pricing services approved by the Board of Trustees to value its investments. Debt securities, including restricted securities, for which quotations are readily available, are valued by independent pricing services or by dealers who make markets in such securities. Pricing services consider yield or price of bonds of comparable quality, coupon, maturity and type as well as dealer supplied prices. Certain of the Fund's securities may be valued only by a single dealer. Equity securities, including restricted securities, for which market quotations are readily available, are valued at the last reported sale price or official closing price as reported by an independent pricing service on the primary market or exchange on which they are traded. In the event there were no sales during the day or closing prices are not available, securities are valued at the last quoted bid price.

When current market prices or quotations are not readily available or do not accurately reflect fair value, valuations may be determined in accordance with procedures adopted by the Board of Trustees. The frequency of when fair value pricing is used is unpredictable. The value of securities used for NAV calculation under fair value pricing may differ from published prices for the same securities. Investments in open-end mutual funds are valued at their closing net asset value each business day. Short-term securities with remaining maturities of sixty days or less for which quotations are not readily available are valued at amortized cost, which approximates value.

Foreign Currency. The Fund uses foreign currency contracts to facilitate transactions in foreign-denominated securities. Losses from these transactions may arise from changes in the value of the foreign currency or if the counterparties do not perform under the contracts' terms.

Foreign-denominated assets, including investment securities, and liabilities are translated into U.S. dollars at the exchange rate at period end. Purchases and sales of investment securities, income and dividends received and expenses denominated in foreign currencies are translated into U.S. dollars at the exchange rate in effect on the transaction date.

The effects of exchange rate fluctuations on investments are included with the net realized and unrealized gain (loss) on investment securities. Other foreign currency transactions resulting in realized and unrealized gain (loss) are disclosed separately.

Investment Transactions and Income. For financial reporting purposes, the Fund's investment holdings and NAV include trades executed through the end of the last business day of the period. The NAV for processing shareholder transactions includes trades executed through the end of the prior business day. Gains and losses on securities sold are determined on the basis of identified cost. Dividend income is recorded on the ex-dividend date, except for certain dividends from foreign securities where the ex-dividend date may have passed, which are recorded as soon as the Fund is informed of the ex-dividend date. Non-cash dividends included in dividend income, if any, are recorded at the fair market value of the securities received. Distributions received on securities that represent a return of capital or capital gain are recorded as a reduction of cost of investments and/or as a realized gain. The Fund estimates the components of distributions received that may be considered return of capital distributions or capital gain distributions. Interest income is accrued as earned. Interest income includes coupon interest and amortization of premium and accretion of discount on debt securities. The Fund follows the provisions of Emerging Issues Task Force Issue No. 99-20 (EITF 99-20), "Recognition of Interest Income and Impairment on Purchased and Retained Beneficial Interests in Securitized Financial Assets" for certain lower credit quality securitized assets that have contractual cash flows (for example, asset backed securities, collateralized mortgage obligations and commercial mortgage-backed securities). Under EITF 99-20, if there is a change in the estimated cash flows for any of these securities, based on an evaluation of current information, then the estimated yield is adjusted on a prospective basis over the remaining life of the security. Investment income is recorded net of foreign taxes withheld where recovery of such taxes is uncertain. Debt obligations may be placed on non-accrual status and related interest income may be reduced by ceasing current accruals and writing off interest receivables when the collection of all or a portion of interest has become doubtful based on consistently applied procedures. A debt obligation is removed from non-accrual status when the issuer resumes interest payments or when collectibility of interest is reasonably assured.

Expenses. Most expenses of the trust can be directly attributed to a fund. Expenses which cannot be directly attributed are apportioned among each Fund in the trust. Expense estimates are accrued in the period to which they relate and adjustments are made when actual amounts are known.

Semiannual Report

Notes to Financial Statements - continued

2. Significant Accounting Policies - continued

Income Tax Information and Distributions to Shareholders. Each year, the Fund intends to qualify as a regulated investment company by distributing all of its taxable income and realized gains under Subchapter M of the Internal Revenue Code. As a result, no provision for income taxes is required in the accompanying financial statements. Foreign taxes are provided for based on the Fund's understanding of the tax rules and rates that exist in the foreign markets in which it invests.

Dividends are declared daily and paid monthly from net investment income. Distributions from realized gains, if any, are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from generally accepted accounting principles.

Capital accounts within the financial statements are adjusted for permanent book-tax differences. These adjustments have no impact on net assets or the results of operations. Temporary book-tax differences will reverse in a subsequent period.

Book-tax differences are primarily due to foreign currency transactions, passive foreign investment companies (PFIC), market discount and losses deferred due to excise tax regulations.

The federal tax cost of investments and unrealized appreciation (depreciation) as of period end were as follows:

Unrealized appreciation

$ 40,009,469

Unrealized depreciation

(13,683,027)

Net unrealized appreciation (depreciation)

$ 26,326,442

Cost for federal income tax purposes

$ 565,936,277

New Accounting Pronouncements. In July 2006, Financial Accounting Standards Board Interpretation No. 48, Accounting for Uncertainty in Income Taxes - an interpretation of FASB Statement 109 (FIN 48), was issued and is effective on the last business day of the semiannual reporting period for fiscal years beginning after December 15, 2006. FIN 48 sets forth a threshold for financial statement recognition, measurement and disclosure of a tax position taken or expected to be taken on a tax return. Management has concluded that the adoption of FIN 48 will not result in a material impact on the Fund's net assets, results of operations and financial statement disclosures.

In addition, in September 2006, Statement of Financial Accounting Standards No. 157, Fair Value Measurements (SFAS 157), was issued and is effective for fiscal years beginning after November 15, 2007. SFAS 157 defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. Management is currently evaluating the impact the adoption of SFAS 157 will have on the Fund's financial statement disclosures.

3. Operating Policies.

Repurchase Agreements. Fidelity Management & Research Company (FMR) has received an Exemptive Order from the Securities and Exchange Commission (the SEC) which permits the Fund and other affiliated entities of FMR to transfer uninvested cash balances into joint trading accounts which are then invested in repurchase agreements. The Fund may also invest directly with institutions in repurchase agreements. Repurchase agreements are collateralized by government or non-government securities. Upon settlement date, collateral is held in segregated accounts with custodian banks and may be obtained in the event of a default of the counterparty. The Fund monitors, on a daily basis, the value of the collateral to ensure it is at least equal to the principal amount of the repurchase agreement (including accrued interest). In the event of a default by the counterparty, realization of the collateral proceeds could be delayed, during which time the value of the collateral may decline.

Restricted Securities. The Fund may invest in securities that are subject to legal or contractual restrictions on resale. These securities generally may be resold in transactions exempt from registration or to the public if the securities are registered. Disposal of these securities may involve time-consuming negotiations and expense, and prompt sale at an acceptable price may be difficult. Information regarding restricted securities is included at the end of the Fund's Schedule of Investments.

Loans and Other Direct Debt Instruments. The Fund may invest in loans and loan participations, trade claims or other receivables. These investments may include standby financing commitments, including revolving credit facilities, that obligate the Fund to supply additional cash to the borrower on demand. Loan participations involve a risk of insolvency of the lending bank or other financial intermediary. The Fund may be contractually obligated to receive approval from the agent bank and/or borrower prior to the sale of these investments.

4. Purchases and Sales of Investments.

Purchases and sales of securities, other than short-term securities, aggregated $75,306,749 and $31,765,694, respectively.

Semiannual Report

5. Fees and Other Transactions with Affiliates.

Management Fee. FMR and its affiliates provide the Fund with investment management related services for which the Fund pays a monthly management fee. The management fee is the sum of an individual fund fee rate that is based on an annual rate of .60% of the Fund's average net assets and a group fee rate that averaged .12% during the period. The group fee rate is based upon the average net assets of all the mutual funds advised by FMR. The group fee rate decreases as assets under management increase and increases as assets under management decrease. For the period, the total annualized management fee rate was .72% of the Fund's average net assets.

Transfer Agent Fees. Fidelity Investments Institutional Operations Company, Inc. (FIIOC), an affiliate of FMR, is the Fund's transfer, dividend disbursing and shareholder servicing agent. FIIOC receives account fees and asset-based fees that vary according to account size and type of account. FIIOC pays for typesetting, printing and mailing of shareholder reports, except proxy statements. For the period, the transfer agent fees were equivalent to an annualized rate of .02% of average net assets.

Accounting Fees. Fidelity Service Company, Inc. (FSC), an affiliate of FMR, maintains the Fund's accounting records. The fee is based on the level of average net assets for the month.

Interfund Lending Program. Pursuant to an Exemptive Order issued by the SEC, the Fund, along with other registered investment companies having management contracts with FMR, may participate in an interfund lending program. This program provides an alternative credit facility allowing the funds to borrow from, or lend money to, other participating affiliated funds. At period end, there were no interfund loans outstanding. The Fund's activity in this program during the period for which loans were outstanding was as follows:

Borrower or Lender

Average Daily
Loan Balance

Weighted Average Interest Rate

Lender

$ 11,679,857

5.40%

6. Committed Line of Credit.

The Fund participates with other funds managed by FMR in a $4.2 billion credit facility (the "line of credit") to be utilized for temporary or emergency purposes to fund shareholder redemptions or for other short-term liquidity purposes. The Fund has agreed to pay commitment fees on its pro rata portion of the line of credit, which amounted to $739 and is reflected in Miscellaneous Expense on the Statement of Operations. During the period, there were no borrowings on this line of credit.

7. Expense Reductions.

Through arrangements with the Fund's custodian and transfer agent, credits realized as a result of uninvested cash balances were used to reduce the Fund's expenses. During the period, these credits reduced the Fund's custody and transfer agent expenses by $4,650 and $1,942, respectively.

8. Credit Risk.

The Fund invests a significant portion of its assets in below investment grade securities with contractual cash flows, such as asset backed securities, collateralized mortgage obligations and commercial mortgaged backed securities. As these securities have a higher degree of sensitivity to changes in economic conditions, including real estate values, the risk of default is higher, and the liquidity and/or value of such securities may be adversely affected.

9. Other.

The Fund's organizational documents provide former and current trustees and officers with a limited indemnification against liabilities arising in connection with the performance of their duties to the Fund. In the normal course of business, the Fund may also enter into contracts that provide general indemnifications. The Fund's maximum exposure under these arrangements is unknown as this would be dependent on future claims that may be made against the Fund. The risk of material loss from such claims is considered remote.

At the end of the period, four otherwise unaffiliated shareholders were the owners of record of 49% of the total outstanding shares of the Fund.

The United States Securities and Exchange Commission ("SEC") is conducting an investigation of FMR (covering the years 2002 to 2004) arising from gifts, gratuities and business entertainment provided by certain brokers to certain individuals who were employed on FMR's domestic equity trading desk during that period. FMR is in discussions with the SEC staff regarding the possible resolution of the matter, but as of period-end no final resolution has been reached.

Semiannual Report

Notes to Financial Statements - continued

9. Other - continued

In December 2006, the Independent Trustees completed their own investigation of the matter with the assistance of independent counsel. The Independent Trustees and FMR agree that, despite the absence of proof that the Fidelity mutual funds experienced diminished execution quality as a result of the improper receipt of gifts and business entertainment, the conduct at issue was serious and is worthy of redress. Accordingly, the Independent Trustees have requested and FMR has agreed to pay $42 million to Fidelity mutual funds, plus interest to be determined at the time that payment is made. A method of allocating this payment among the funds has not yet been determined. The total payment to the Fund is not anticipated to have a material impact on the Fund's net assets. In addition, FMR reimbursed related legal expenses which are recorded in the accompanying Statement of Operations as an expense reduction.

On April 19, 2007, the Board of Trustees approved an Agreement and Plan of Reorganization whereby the Fund will reorganize into Fidelity Advisor Series I Trust, effective on or about June 29, 2007. The reorganization will not impact the Fund's investment strategies or FMR's management of the Fund. All legal and other expenses associated with the reorganization will be paid by FMR.

Semiannual Report

Report of Independent Registered Public Accounting Firm

To the Trustees of Fidelity Advisor Series IV and the Shareholders of Fidelity Real Estate High Income Fund:

In our opinion, the accompanying statement of assets and liabilities, including the schedule of investments, and the related statements of operations and of changes in net assets and the financial highlights present fairly, in all material respects, the financial position of Fidelity Real Estate High Income Fund (a fund of Fidelity Advisor Series IV) at May 31, 2007, the results of its operations, the changes in its net assets and the financial highlights for each of the periods indicated, in conformity with accounting principles generally accepted in the United States of America. These financial statements and financial highlights (hereafter referred to as "financial statements") are the responsibility of the Fidelity Real Estate High Income Fund's management. Our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits of these financial statements in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits, which included confirmation of securities at May 31, 2007 by correspondence with the custodian and brokers, provide a reasonable basis for our opinion.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Boston, Massachusetts

July 19, 2007

Semiannual Report

Board Approval of Investment Advisory Contracts and Management Fees

Fidelity Real Estate High Income Fund

On April 19, 2007, the Board of Trustees, including the Independent Trustees (together, the Board), voted to approve the management contract and subadvisory agreements (together, the Advisory Contracts) for the fund in connection with reorganizing the fund from one Trust to another. The Board reached this determination because the contractual terms of and fees payable under the fund's Advisory Contracts are identical to those in the fund's current Advisory Contracts. The Advisory Contracts involve no changes in (i) the investment process or strategies employed in the management of the fund's assets; (ii) the nature or level of services provided under the fund's Advisory Contracts; or (iii) the day-to-day management of the fund or the persons primarily responsible for such management. The Board considered that it approved the Advisory Contracts for the fund during the past year and that it will again consider renewal of the Advisory Contracts in June 2007.

Because the Board was approving Advisory Contracts with terms identical to the current Advisory Contracts, it did not consider the fund's investment performance, competitiveness of management fee and total expenses, costs of services and profitability, or economies of scale to be significant factors in its decision.

In connection with its future renewal of the fund's Advisory Contracts, the Board will consider: (i) the nature, extent, and quality of services provided to the fund, including shareholder and administrative services and investment performance; (ii) the competitiveness of the fund's management fee and total expenses; (iii) the costs of the services and profitability, including the revenues earned and the expenses incurred by Fidelity in conducting the business of developing, marketing, distributing, managing, administering, and servicing the fund and its shareholders; and (iv) whether there have been economies of scale in respect of the management of the Fidelity funds, whether the Fidelity funds (including the fund) have appropriately benefited from any such economies of scale, and whether there is potential for realization of any further economies.

Based on its evaluation of all of the conclusions noted above, and after considering all material factors, the Board ultimately concluded that the fund's Advisory Contracts are fair and reasonable, and that the fund's Advisory Contracts should be approved, without modification, as part of the process of reorganizing the fund from one Trust to another.

Semiannual Report

Semiannual Report

Semiannual Report

Semiannual Report

Investment Adviser

Fidelity Management & Research Company
Boston, MA

Investment Sub-Advisers

FMR Co., Inc.

Fidelity Research & Analysis Company
(formerly Fidelity Management & Research (Far East) Inc.)

Fidelity International Investment Advisors

Fidelity Investments Japan Limited

Fidelity International Investment Advisors
(U.K.) Limited

General Distributor

Fidelity Distributors Corporation
Boston, MA

Transfer and Service Agents

Fidelity Investments Institutional Operations Company, Inc.
Boston, MA

Fidelity Service Company, Inc.
Boston, MA

Custodian

The Bank of New York
New York, NY

REHI-USAN-0707
1.786816.104

Item 2. Code of Ethics

Not applicable.

Item 3. Audit Committee Financial Expert

Not applicable.

Item 4. Principal Accountant Fees and Services

Not applicable.

Item 5. Audit Committee of Listed Registrants

Not applicable.

Item 6. Schedule of Investments

Not applicable.

Item 7. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies

Not applicable.

Item 8. Portfolio Managers of Closed-End Management Investment Companies

Not applicable.

Item 9. Purchase of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers

Not applicable.

Item 10. Submission of Matters to a Vote of Security Holders

There were no material changes to the procedures by which shareholders may recommend nominees to the Fidelity Advisor Series IV's Board of Trustees.

Item 11. Controls and Procedures

(a)(i) The President and Treasurer and the Chief Financial Officer have concluded that the Fidelity Advisor Series IV's (the "Trust") disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act) provide reasonable assurances that material information relating to the Trust is made known to them by the appropriate persons, based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of this report.

(a)(ii) There was no change in the Trust's internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act) that occurred during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the Trust's internal control over financial reporting.

Item 12. Exhibits

(a)

(1)

Not applicable.

(a)

(2)

Certification pursuant to Rule 30a-2(a) under the Investment Company Act of 1940 (17 CFR 270.30a-2(a)) is filed and attached hereto as Exhibit 99.CERT.

(a)

(3)

Not applicable.

(b)

Certification pursuant to Rule 30a-2(b) under the Investment Company Act of 1940 (17 CFR 270.30a-2(b)) is furnished and attached hereto as Exhibit 99.906CERT.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Fidelity Advisor Series IV

By:

/s/Kimberley Monasterio

Kimberley Monasterio

President and Treasurer

Date:

July 20, 2007

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By:

/s/Kimberley Monasterio

Kimberley Monasterio

President and Treasurer

Date:

July 20, 2007

By:

/s/Joseph B. Hollis

Joseph B. Hollis

Chief Financial Officer

Date:

July 20, 2007