**Exhibit99.1**

**Janus Investment Fund("JIF")**

** **
| ** **                              | ** ** | ** **            | ** ** | ** **                             | ** ** | **Lipper Rankings Based**                         | ** ** |
|-----------------------------------------|------------|-----------------------|------------|----------------------------------------|------------|-------------------------------------------------------------|------------|
| ** **                              | ** ** | ** **            | ** ** | ** **                             | ** ** | **on Total Returns as of 9/30/07** | ** ** |
| ** **                              | ** ** | ** **            | ** ** | ** **                             | ** ** | **1-Year**                                                  | ** ** | **3-Year** | ** ** | **5-Year** | ** ** | **10-Year** | ** ** | **Since PM Inception** | ** ** |
| ** **                              | ** ** | ** **            | ** ** | ** **                             | ** ** | **Percentile**                                              | ** ** | **Rank /** | ** ** | **Percentile** | ** ** | **Rank /** | ** ** | **Percentile** | ** ** | **Rank /** | ** ** | **Percentile** | ** ** | **Rank /** | ** ** | **Percentile** | ** ** | **Rank /** | ** ** |
| ** **                              | ** ** | **PM Inception** | ** ** | **Lipper Category**               | ** ** | **Rank (%)**                                           | ** ** | **Total Funds** | ** ** | **Rank (%)** | ** ** | **Total Funds** | ** ** | **Rank (%)** | ** ** | **Total Funds** | ** ** | **Rank (%)** | ** ** | **Total Funds** | ** ** | **Rank (%)** | ** ** | **Total Funds** | ** ** |
| **Growth  Funds**                       | * *   | * *              | * *   | * *                               | * *   | * *                                                    | * *   | * * | * * | * * | * * | * * | * * | * * | * * | * * | * * | * * | * * | * * | * * | * * | * * | * * | * * |
| Janus Fund                              |       | Jan-06                |       | Large-Cap Growth Funds                 | ** ** | **34**                                                      | ** ** | **245 /  728** | ** ** | **23** | ** ** | **141 /  621** | ** ** | **37** | ** ** | **191 /  519** | ** ** | **32** | ** ** | **70 / 219** | ** ** | **10** | ** ** | **68 / 696** | ** ** |
| Janus Twenty Fund(1)                    |       | Aug-97                |       | Large-Cap Growth Funds                 | ** ** | **1**                                                       | ** ** | **6 / 728** | ** ** | **1** | ** ** | **5 / 621** | ** ** | **1** | ** ** | **2 / 519** | ** ** | **2** | ** ** | **4 / 219** | ** ** | **2** | ** ** | **3 / 218** | ** ** |
| Janus Research  Fund                    |       | Jan-06                |       | Large-Cap Growth Funds                 | ** ** | **3**                                                       | ** ** | **18 / 728** | ** ** | **3** | ** ** | **18 / 621** | ** ** | **3** | ** ** | **11 / 519** | ** ** | **3** | ** ** | **5 / 219** | ** ** | **3** | ** ** | **17 / 696** | ** ** |
| Janus Orion Fund                        |       | Jun-00                |       | Multi-Cap Growth Funds                 | ** ** | **2**                                                       | ** ** | **8 / 518** | ** ** | **1** | ** ** | **1 / 416** | ** ** | **2** | ** ** | **7 / 349** | ** ** | **—** | ** ** | **—** | ** ** | **20** | ** ** | **45 / 226** | ** ** |
| Janus Enterprise  Fund                  |       | Jan-02                |       | Mid-Cap Growth Funds                   | ** ** | **31**                                                      | ** ** | **186 /  609** | ** ** | **19** | ** ** | **89 / 485** | ** ** | **18** | ** ** | **67 / 392** | ** ** | **43** | ** ** | **69 / 162** | ** ** | **13** | ** ** | **46 / 359** | ** ** |
| Janus Venture  Fund(1)                  |       | Jan-01                |       | Small-Cap Growth Funds                 | ** ** | **7**                                                       | ** ** | **37 / 586** | ** ** | **8** | ** ** | **33 / 469** | ** ** | **3** | ** ** | **11 / 388** | ** ** | **17** | ** ** | **28 / 169** | ** ** | **14** | ** ** | **44 / 315** | ** ** |
| Janus Triton Fund                       |       | Jun-06                |       | Small-Cap Growth Funds                 | ** ** | **5**                                                       | ** ** | **25 / 586** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **2** | ** ** | **6 / 569** | ** ** |
| **Core  Funds**                         |       |                  |       |                                   |       |                                                        |       |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Janus Contrarian  Fund                  |       | Feb-00                |       | Multi-Cap Core Funds                   | ** ** | **1**                                                       | ** ** | **6 / 876** | ** ** | **1** | ** ** | **1 / 662** | ** ** | **1** | ** ** | **2 / 493** | ** ** | **—** | ** ** | **—** | ** ** | **9** | ** ** | **27 / 314** | ** ** |
| Janus Growth and  Income Fund           |       | Dec-03                |       | Large-Cap Core Funds                   | ** ** | **25**                                                      | ** ** | **198 /  817** | ** ** | **7** | ** ** | **44 / 681** | ** ** | **30** | ** ** | **170 /  568** | ** ** | **4** | ** ** | **9 / 276** | ** ** | **12** | ** ** | **74 / 639** | ** ** |
| Janus Balanced  Fund                    |       | Apr-05                |       | Mixed-Asset Target Alloc. Mod. Funds   | ** ** | **14**                                                      | ** ** | **60 / 442** | ** ** | **14** | ** ** | **45 / 343** | ** ** | **58** | ** ** | **134 /  231** | ** ** | **4** | ** ** | **4 / 127** | ** ** | **6** | ** ** | **21 / 377** | ** ** |
| Janus Fundamental  Equity Fund          |       | Apr-05                |       | Large-Cap Core Funds                   | ** ** | **25**                                                      | ** ** | **203 /  817** | ** ** | **3** | ** ** | **20 / 681** | ** ** | **11** | ** ** | **60 / 568** | ** ** | **1** | ** ** | **2 / 276** | ** ** | **4** | ** ** | **27 / 721** | ** ** |
| INTECH  Risk-Managed Stock Fund         |       | Feb-03                |       | Multi-Cap Core Funds                   | ** ** | **83**                                                      | ** ** | **725 /  876** | ** ** | **56** | ** ** | **371 /  662** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **44** | ** ** | **228 /  525** | ** ** |
| **International/Global  Funds**         |       |                  |       |                                   |       |                                                        |       |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Janus Overseas  Fund                    |       | Jun-03                |       | International Funds                    | ** ** | **1**                                                       | ** ** | **1 / 1049** | ** ** | **1** | ** ** | **1 / 812** | ** ** | **1** | ** ** | **1 / 671** | ** ** | **3** | ** ** | **8 / 299** | ** ** | **1** | ** ** | **1 / 721** | ** ** |
| Janus Worldwide  Fund                   |       | Jun-04                |       | Global Funds                           | ** ** | **23**                                                      | ** ** | **90 / 406** | ** ** | **68** | ** ** | **210 /  309** | ** ** | **94** | ** ** | **245 /  262** | ** ** | **75** | ** ** | **80 / 107** | ** ** | **69** | ** ** | **207 /  303** | ** ** |
| Janus Global  Technology Fund           |       | Jan-06                |       | Science & Technology Funds         | ** ** | **22**                                                      | ** ** | **60 / 278** | ** ** | **25** | ** ** | **63 / 254** | ** ** | **75** | ** ** | **174 /  232** | ** ** | **—** | ** ** | **—** | ** ** | **40** | ** ** | **109 /  274** | ** ** |
| Janus Global Life  Sciences Fund        |       | Apr-07                |       | Health/Biotechnology Funds             | ** ** | **27**                                                      | ** ** | **47 / 175** | ** ** | **30** | ** ** | **45 / 154** | ** ** | **44** | ** ** | **60 / 137** | ** ** | **—** | ** ** | **—** | ** ** | **‡** | ** ** |
| Janus Global  Research Fund             |       | Feb-05                |       | Global Funds                           | ** ** | **5**                                                       | ** ** | **17 / 406** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **4** | ** ** | **13 / 328** | ** ** |
| Janus Global  Opportunities Fund        |       | Jun-01                |       | Global Funds                           | ** ** | **21**                                                      | ** ** | **85 / 406** | ** ** | **84** | ** ** | **260 /  309** | ** ** | **68** | ** ** | **178 /  262** | ** ** | **—** | ** ** | **—** | ** ** | **19** | ** ** | **39 / 210** | ** ** |
| **Value  Funds**                        |       |                  |       |                                   |       |                                                        |       |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Janus Mid Cap  Value Fund - Inv(2)      |       | Aug-98                |       | Mid-Cap Value Funds                    | ** ** | **28**                                                      | ** ** | **86 / 308** | ** ** | **43** | ** ** | **102 /  238** | ** ** | **39** | ** ** | **70 / 183** | ** ** | **—** | ** ** | **—** | ** ** | **3** | ** ** | **2 / 68** | ** ** |
| Janus Small Cap  Value Fund - Inv.(1,2) |       | Feb-97                |       | Small-Cap Core Funds                   | ** ** | **46**                                                      | ** ** | **342 /  744** | ** ** | **73** | ** ** | **417 /  574** | ** ** | **74** | ** ** | **333 /  451** | ** ** | **11** | ** ** | **17 / 161** | ** ** | **14** | ** ** | **18 / 129** | ** ** |
| **Income  Funds**                       |       |                  |       |                                   |       |                                                        |       |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Janus Flexible  Bond Fund               |       | May-07                |       | Intermediate Inv Grade Debt Funds      | ** ** | **20**                                                      | ** ** | **104 /  524** | ** ** | **40** | ** ** | **180 /  455** | ** ** | **36** | ** ** | **138 /  393** | ** ** | **42** | ** ** | **75 / 181** | ** ** | **‡** | ** ** |
| Janus High-Yield  Fund                  |       | Dec-03                |       | High Current Yield Funds               | ** ** | **65**                                                      | ** ** | **285 /  444** | ** ** | **50** | ** ** | **185 /  376** | ** ** | **86** | ** ** | **274 /  319** | ** ** | **19** | ** ** | **27 / 146** | ** ** | **45** | ** ** | **161 /  361** | ** ** |
| Janus Short-Term  Bond Fund             |       | May-07                |       | Short Investment Grade Debt Funds      | ** ** | **42**                                                      | ** ** | **97 / 234** | ** ** | **52** | ** ** | **104 /  201** | ** ** | **16** | ** ** | **23 / 148** | ** ** | **40** | ** ** | **32 / 81** | ** ** | **‡** | ** ** |
| Janus Federal  Tax-Exempt Fund          |       | Feb-05                |       | General Muni Debt Funds                | ** ** | **99**                                                      | ** ** | **234 /  236** | ** ** | **99** | ** ** | **218 /  220** | ** ** | **99** | ** ** | **209 /  212** | ** ** | **92** | ** ** | **127 /  138** | ** ** | **100** | ** ** | **221 /  221** | ** ** |
| **Asset  Allocation Funds**             |       |                  |       |                                   |       |                                                        |       |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Janus Smart  Portfolio-Growth           |       | Dec-05                |       | Mixed-Asset Target Alloc. Growth Funds | ** ** | **2**                                                       | ** ** | **10 / 627** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **3** | ** ** | **14 / 590** | ** ** |
| Janus Smart  Portfolio-Moderate         |       | Dec-05                |       | Mixed-Asset Target Alloc. Mod. Funds   | ** ** | **2**                                                       | ** ** | **7 / 442** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **2** | ** ** | **8 / 412** | ** ** |
| Janus Smart  Portfolio-Conservative     |       | Dec-05                |       | Mixed-Asset Target Alloc. Cons. Funds  | ** ** | **1**                                                       | ** ** | **4 / 401** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **—** | ** ** | **2** | ** ** | **6 / 353** | ** ** |

** **
| ** **   | ** ** | **Percent of JIF Funds per Lipper Quartile based on Total Returns** | ** ** |
|--------------|------------|-----------------------------------------------------------------------------------------------------------------------|------------|
| ** **   | ** ** | **1-Year**                                                                                                            | ** ** | **3-Year** | ** ** | **5-Year** | ** ** | **10-Year** | ** ** | **Since PM Inception** | ** ** |
| 1st Quartile |       | 66.7                                                                                                                  | %          | 54.5 | % | 42.9 | % | 60.0 | % | 79.2 | % |
| 2nd Quartile |       | 22.2                                                                                                                  | %          | 18.2 | % | 23.8 | % | 26.7 | % | 12.5 | % |
| 3rd Quartile |       | 3.7                                                                                                                   | %          | 18.2 | % | 19.0 | % | 6.7 | % | 4.2 | % |
| 4th Quartile |       | 7.4                                                                                                                   | %          | 9.1 | % | 14.3 | % | 6.7 | % | 4.2 | % |

 

Please considerthe charges, risks, expenses and investment objectives carefully beforeinvesting. For a prospectus containing this and other information, please callJanus at 1-800-525-1068 or download the file from janus.com. Read it carefullybefore you invest or send money.

 

Lipper Inc. – AReuters Company, is a nationally recognized organization that ranks theperformance of mutual funds within a universe of funds that have similarinvestment objectives. Rankings are historical with capital gains and dividendsreinvested. If an expense waiver was in effect, it may have had a materialeffect on the total return or yield for the period.

 

Data presentedreflects past performance, which is no guarantee of future results.

 

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Notes:

(1)          Closed to newinvestors.

(2)          Ranking is for theinvestor share class only; other classes may have different performancecharacteristics.

 ‡               The Fund’s sincePM-Inception ranking is not available.

 

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