SCHEDULE OF INVESTMENTS December 31, 2020 TRANSPORTATION FUND

Shares Value Shares Value

COMMON STOCKS† - 99.6% Fox Factory Holding Corp.* 716 $ 75,688 Visteon Corp.* 530 66,526 TRANSPORTATION - 43.5% Adient plc* 1,878 65,298 Union Pacific Corp. 2,144 $ 446,424 Dana, Inc. 3,069 59,907 United Parcel Service, Inc. — Class B 2,520 424,368 Goodyear Tire & Rubber Co. 5,468 59,656 CSX Corp. 3,395 308,096 Norfolk Southern Corp. 1,245 295,824 Total Auto Parts & Equipment 961,110 FedEx Corp. 1,104 286,621 INTERNET - 6.1% Old Dominion Freight Line, Inc. 931 181,713 Uber Technologies, Inc.* 6,666 339,966 Kansas City Southern 804 164,121 Lyft, Inc. — Class A* 2,832 139,136 Expeditors International Total Internet 479,102 of Washington, Inc. 1,520 144,567 J.B. Hunt Transport Services, Inc. 1,005 137,333 HOME BUILDERS - 2.5% CH Robinson Worldwide, Inc. 1,416 132,920 Thor Industries, Inc. 903 83,970 XPO Logistics, Inc.* 1,021 121,703 LCI Industries 490 63,543 ZTO Express Cayman, Inc. ADR 3,508 102,293 Winnebago Industries, Inc. 870 52,148 Knight-Swift Transportation Holdings, Inc. 2,349 98,235 Total Home Builders 199,661 Canadian Pacific Railway Ltd. 278 96,380 Canadian National Railway Co. 857 94,141 LEISURE TIME - 1.1% Landstar System, Inc. 613 82,547 Harley-Davidson, Inc. 2,476 90,869 Saia, Inc.* 436 78,829 COMMERCIAL SERVICES - 0.8% Kirby Corp.* 1,323 68,571 Avis Budget Group, Inc.* 1,626 60,650 Ryder System, Inc. 1,068 65,960 Werner Enterprises, Inc. 1,528 59,928 Total Common Stocks Atlas Air Worldwide Holdings, Inc.* 810 44,177 (Cost $4,132,343) 7,866,302 Total Transportation 3,434,751 Face AUTO MANUFACTURERS - 19.5% Amount Tesla, Inc.* 1,070 755,067 General Motors Co. 6,948 289,315 REPURCHASE AGREEMENTS††,2 - 0.4% NIO, Inc. ADR* 3,600 175,464 J.P. Morgan Securities LLC Fiat Chrysler Automobiles N.V. 4,919 88,985 issued 12/31/20 at 0.06% Ferrari N.V. 387 88,824 due 01/04/21 $ 19,692 19,692 Nikola Corp.*,1 5,730 87,440 Barclays Capital, Inc. Workhorse Group, Inc.*,1 2,820 55,779 issued 12/31/20 at 0.06% Total Auto Manufacturers 1,540,874 due 01/04/21 8,204 8,204 AIRLINES - 13.9% BofA Securities, Inc. Southwest Airlines Co. 4,184 195,016 issued 12/31/20 at 0.06% Delta Air Lines, Inc. 4,634 186,333 due 01/04/21 7,596 7,596 United Airlines Holdings, Inc.* 3,045 131,696 Total Repurchase Agreements American Airlines Group, Inc.1 6,867 108,293 (Cost $35,492) 35,492 Alaska Air Group, Inc. 1,869 97,188 Ryanair Holdings plc ADR* 819 90,074 Shares Copa Holdings S.A. — Class A 1,117 86,266 JetBlue Airways Corp.* 5,686 82,674 SECURITIES LENDING COLLATERAL†,3 - 2.7% Allegiant Travel Co. — Class A 360 68,126 Money Market Fund ,1 Spirit Airlines, Inc.* 2,193 53,619 First American Government Total Airlines 1,099,285 Obligations Fund — Class Z, 0.03%4 214,937 214,937 Total Securities Lending Collateral AUTO PARTS & EQUIPMENT - 12.2% (Cost $214,937) 214,937 Aptiv plc 915 119,215 BorgWarner, Inc. 2,929 113,177 Total Investments - 102.7% Lear Corp. 681 108,299 (Cost $4,382,772) $ 8,116,731 Gentex Corp. 3,133 106,303 Other Assets & Liabilities, net - (2.7)% (216,855) Magna International, Inc. 1,380 97,704 Autoliv, Inc. 970 89,337 Total Net Assets - 100.0% $ 7,899,876 SCHEDULE OF INVESTMENTS (concluded) December 31, 2020 TRANSPORTATION FUND

* Non-income producing security. † Value determined based on Level 1 inputs. †† Value determined based on Level 2 inputs. 1 All or a portion of this security is on loan at December 31, 2020. 2 Repurchase Agreements. 3 Securities lending collateral. 4 Rate indicated is the 7-day yield as of December 31, 2020. ADR — American Depositary Receipt plc — Public Limited Company