MainStay MacKay Short Duration High Yield Fund Portfolio of Investments July 31, 2021† (Unaudited) Principal Amount Value Long-Term Bonds 94.1% Convertible Bonds 1.8% Investment Companies 0.5% Ares Capital Corp. 3.75%, due 2/1/22 $ 2,435,000 $ 2,567,403 4.625%, due 3/1/24 4,500,000 4,891,050 7,458,453 Media 1.3% DISH Network Corp. 2.375%, due 3/15/24 21,650,000 21,000,500 Total Convertible Bonds (Cost $26,949,668) 28,458,953 Corporate Bonds 74.4% Advertising 0.3% Outfront Media Capital LLC 6.25%, due 6/15/25 (a) 4,000,000 4,243,840 Aerospace & Defense 1.0% F-Brasile SpA Series XR 7.375%, due 8/15/26 (a) 3,600,000 3,717,000 Spirit AeroSystems, Inc. 5.50%, due 1/15/25 (a) 2,125,000 2,231,250 TransDigm UK Holdings plc 6.875%, due 5/15/26 1,500,000 1,581,750 TransDigm, Inc. (a) 6.25%, due 3/15/26 4,150,000 4,352,313 8.00%, due 12/15/25 3,875,000 4,160,781 16,043,094 Airlines 1.1% American Airlines, Inc. 5.50%, due 4/20/26 (a) 2,200,000 2,301,750 Delta Air Lines, Inc. 4.50%, due 10/20/25 (a) 2,000,000 2,150,000 7.00%, due 5/1/25 (a) 4,125,000 4,852,031 7.375%, due 1/15/26 1,000,000 1,177,211 Spirit Loyalty Cayman Ltd. 8.00%, due 9/20/25 (a) 987,350 1,108,301 United Airlines, Inc. 4.375%, due 4/15/26 (a) 5,800,000 5,967,504 17,556,797 Apparel 0.0% ‡ Levi Strauss & Co. 5.00%, due 5/1/25 300,000 305,625 Principal Amount Value Corporate Bonds Auto Manufacturers 2.7% Ford Motor Co. 8.50%, due 4/21/23 $ 1,800,000 $ 1,998,414 9.00%, due 4/22/25 3,290,000 4,049,825 Ford Motor Credit Co. LLC 2.979%, due 8/3/22 1,797,000 1,819,463 3.087%, due 1/9/23 2,400,000 2,442,744 3.096%, due 5/4/23 1,065,000 1,086,300 3.219%, due 1/9/22 700,000 705,716 3.339%, due 3/28/22 2,000,000 2,022,000 3.37%, due 11/17/23 4,000,000 4,145,000 3.375%, due 11/13/25 7,000,000 7,307,955 3.664%, due 9/8/24 1,150,000 1,201,750 4.14%, due 2/15/23 1,100,000 1,139,930 5.125%, due 6/16/25 3,000,000 3,303,750 5.584%, due 3/18/24 840,000 915,432 JB Poindexter & Co., Inc. 7.125%, due 4/15/26 (a) 9,115,000 9,604,931 41,743,210 Auto Parts & Equipment 1.7% Adient Global Holdings Ltd. 4.875%, due 8/15/26 (a) 5,635,000 5,761,787 Adient US LLC 9.00%, due 4/15/25 (a) 2,045,000 2,235,594 American Axle & Manufacturing, Inc. 6.25%, due 4/1/25 1,714,000 1,771,848 Exide Global Holding Netherlands CV 10.75%, due 10/26/24 (b)(c)(d) 1,610,000 1,577,800 IHO Verwaltungs GmbH (a)(e) 4.75% (4.75% Cash or 5.50% PIK), due 9/15/26 3,860,000 3,965,957 6.00% (6.00% Cash or 6.75% PIK), due 5/15/27 9,835,000 10,246,727 Meritor, Inc. 6.25%, due 6/1/25 (a) 1,335,000 1,421,775 26,981,488 Building Materials 0.7% Koppers, Inc. 6.00%, due 2/15/25 (a) 5,475,000 5,611,875 Patrick Industries, Inc. 7.50%, due 10/15/27 (a) 2,500,000 2,718,750 Summit Materials LLC (a) 5.125%, due 6/1/25 1,690,000 1,706,359 6.50%, due 3/15/27 1,000,000 1,048,960 11,085,944 Chemicals 1.1% GPD Cos., Inc. 10.125%, due 4/1/26 (a) 4,685,000 5,071,512 Principal Amount Value Corporate Bonds Chemicals Iris Holdings, Inc. 8.75% (8.75% Cash or 9.50% PIK), due 2/15/26 (a)(e) $ 3,000,000 $ 3,059,850 NOVA Chemicals Corp. 4.875%, due 6/1/24 (a) 2,150,000 2,273,217 Olin Corp. 9.50%, due 6/1/25 (a) 1,000,000 1,248,750 TPC Group, Inc. (a) 10.50%, due 8/1/24 2,985,000 2,940,195 10.875%, due 8/1/24 2,600,000 2,743,000 TPC Group, Inc. Escrow Claim Shares (zero coupon), due 12/31/49 (b)(c)(d)(f) 26,000 — 17,336,524 Coal 0.1% Coronado Finance Pty. Ltd. 10.75%, due 5/15/26 (a) 1,500,000 1,627,500 Natural Resource Partners LP 9.125%, due 6/30/25 (a) 295,000 292,788 1,920,288 Commercial Services 1.7% Allied Universal Holdco LLC 6.625%, due 7/15/26 (a) 4,175,000 4,420,281 Alta Equipment Group, Inc. 5.625%, due 4/15/26 (a) 5,000,000 5,175,000 Ashtead Capital, Inc. 5.25%, due 8/1/26 (a) 2,540,000 2,641,600 Graham Holdings Co. 5.75%, due 6/1/26 (a) 2,920,000 3,038,640 IHS Markit Ltd. 5.00%, due 11/1/22 (a) 1,630,000 1,699,055 Jaguar Holding Co. II 4.625%, due 6/15/25 (a) 3,600,000 3,766,500 Legends Hospitality Holding Co. LLC 5.00%, due 2/1/26 (a) 2,000,000 2,070,000 Ritchie Bros Auctioneers, Inc. 5.375%, due 1/15/25 (a) 4,185,000 4,279,162 27,090,238 Distribution & Wholesale 0.6% Avient Corp. 5.25%, due 3/15/23 1,750,000 1,859,375 5.75%, due 5/15/25 (a) 3,665,000 3,848,250 G-III Apparel Group Ltd. 7.875%, due 8/15/25 (a) 3,500,000 3,801,875 9,509,500 Principal Amount Value Corporate Bonds Diversified Financial Services 1.7% Credit Acceptance Corp. 5.125%, due 12/31/24 (a) $ 10,090,000 $ 10,430,537 Enact Holdings, Inc. 6.50%, due 8/15/25 (a) 3,260,000 3,534,892 Oxford Finance LLC 6.375%, due 12/15/22 (a) 7,750,000 7,804,638 PRA Group, Inc. 7.375%, due 9/1/25 (a) 2,650,000 2,855,375 StoneX Group, Inc. 8.625%, due 6/15/25 (a) 1,920,000 2,085,446 26,710,888 Electric 1.5% DPL, Inc. 4.125%, due 7/1/25 3,650,000 3,913,530 Keystone Power LLC 9.00%, due 12/1/23 (c) 270,236 264,831 NextEra Energy Operating Partners LP (a) 3.875%, due 10/15/26 3,500,000 3,683,750 4.25%, due 7/15/24 4,030,000 4,237,343 NRG Energy, Inc. 6.625%, due 1/15/27 1,230,000 1,273,296 7.25%, due 5/15/26 1,000,000 1,040,200 Pacific Gas and Electric Co. 1.75%, due 6/16/22 2,000,000 1,997,255 Vistra Operations Co. LLC (a) 3.55%, due 7/15/24 4,650,000 4,942,557 5.625%, due 2/15/27 1,500,000 1,556,250 22,909,012 Electrical Components & Equipment 0.2% WESCO Distribution, Inc. 7.125%, due 6/15/25 (a) 2,600,000 2,794,974 Energy-Alternate Sources 0.2% TerraForm Power Operating LLC 4.25%, due 1/31/23 (a) 2,520,000 2,586,150 Engineering & Construction 0.1% PowerTeam Services LLC 9.033%, due 12/4/25 (a) 2,000,000 2,202,680 Entertainment 1.9% Churchill Downs, Inc. 5.50%, due 4/1/27 (a) 7,625,000 7,928,323 International Game Technology plc (a) 4.125%, due 4/15/26 3,750,000 3,905,700 Principal Amount Value Corporate Bonds Entertainment International Game Technology plc (a) 6.50%, due 2/15/25 $ 3,000,000 $ 3,347,385 Jacobs Entertainment, Inc. 7.875%, due 2/1/24 (a) 1,000,000 1,041,250 Live Nation Entertainment, Inc. (a) 4.875%, due 11/1/24 2,875,000 2,921,719 6.50%, due 5/15/27 1,000,000 1,103,750 Powdr Corp. 6.00%, due 8/1/25 (a) 2,980,000 3,120,000 Vail Resorts, Inc. 6.25%, due 5/15/25 (a) 5,667,000 6,019,204 29,387,331 Environmental Control 0.1% Covanta Holding Corp. 5.875%, due 7/1/25 1,665,000 1,725,356 Food 0.4% B&G Foods, Inc. 5.25%, due 4/1/25 4,300,000 4,397,137 Lamb Weston Holdings, Inc. (a) 4.625%, due 11/1/24 1,880,000 1,929,181 4.875%, due 11/1/26 205,000 211,519 6,537,837 Food Service 0.8% Aramark Services, Inc. 6.375%, due 5/1/25 (a) 12,185,000 12,857,003 Forest Products & Paper 0.1% Smurfit Kappa Treasury Funding DAC 7.50%, due 11/20/25 1,631,000 2,028,556 Gas 1.0% AmeriGas Partners LP 5.625%, due 5/20/24 7,500,000 8,184,375 Rockpoint Gas Storage Canada Ltd.