Display specific page (that is child) content on parent page

You were being too specific/not passing the correct parameters into your wp_query.
This should get you what you’re looking for:

<?php
$current_page_id = get_the_id();
$investor_content_query = new WP_Query( 'post_parent'=> $current_page_id ) );
if ( $investor_content_query->have_posts() ) {
    while ( $investor_content_query->have_posts() ) {
        $investor_content_query->the_post();
        the_content();
    }
}
wp_reset_postdata();
?>

Related Posts:

  1. Trying to list out child pages with WP_Query
  2. Create a loop on my pages with new “WP_Query”
  3. has_excerpt() not working inside wp_query
  4. How to split a post and intercalate elements from a loop
  5. Why does apply_filters behave different inside and outside a loop?
  6. Determine if ID is page or post and query the ID
  7. Custom query does not find pages
  8. How to use custom page for all posts with custom url, call another directory?
  9. display the children of the post using the current page as the main parent
  10. pages shortcode filtering by category
  11. Retrieving category pages from subcategory returns empty sets
  12. Issue in If else condition [closed]
  13. Can I force WP_Query to return no results?
  14. Page template query with WP_Query
  15. How to display page content in a page template?
  16. Multiple WP_Query loops with Pagination
  17. WP_Query vs get_posts
  18. WP_Query and next_posts_link
  19. Order posts by ID in the given order
  20. Too slow when using both ‘tax_query’ and ‘meta_query’ both in WP_Query
  21. Get array of posts from the current archive page loop
  22. How-to exclude terms from the main query the most performant way?
  23. Pagination with WP_Query is buggy – working for some pages, but not the others
  24. Get the number of posts from the current page results
  25. How can I save an array from a random post sequence for later use?
  26. Does WordPress generate an automatic page for post formats?
  27. In loop: posts have thumbnail AND other variables
  28. How to order category.php loop by ‘meta_value’?
  29. Add inline HTML to posts published within last 24hrs
  30. Move posts to top of WP_Query if in certain Taxonomy?
  31. Display different number of posts from one category on the different pages
  32. Pagination not working Search posts
  33. How to change a custom query into a standard loop?
  34. Injecting content with $wp_query->current_post restarts from zero on paged pages. How to inject content after X posts, regardless of pagination?
  35. Can certain (site-crashing) limitations on WP_Query in shortcode be overcome?
  36. Implementing an OR statement to wordpress wp_query
  37. Get List of all the Authors
  38. 2 loops on page – one with orderby rand second orderby date
  39. Create ONE callback for all page templates, post filter queries + paginated pages, triggering pagination via AJAX
  40. WP_Query loop within WP_Query loop
  41. Refine search results using WP_Query
  42. How to pass many ids in post__in?
  43. How to show subcategories using loop?
  44. Set order of returned items in the WP_Query() class/function
  45. Counter problem, infinite loop when post_per_page equals X
  46. Sub-loop / nested loops Best Practices
  47. Show Sticky Post at the top but do not show again in the loop?
  48. Any number in meta key (wp query)
  49. How do I run through a WordPress loop called from a filter function?
  50. How do I get the title of a category in a custom loop?
  51. Using the_post_thumbnail resets current loop item ID
  52. Out Of memory issue on post per page parameter
  53. Check if loop has any categories?
  54. WordPress query with items from more than one selfdefined taxonomy as `term` argument
  55. Get all fields inlcuding “ACF” (Advanced Custom Fields) columns in wp_query
  56. Why post__not_in is ignored?
  57. Change query from cat id to slug or name?
  58. Using Wp_Query without the loop?
  59. Issue with front page navigation after upgrading to 3.4
  60. Custom WP_Query id
  61. Assign custom parameter to each post in query
  62. Exclude recently updated post from custom WP_Query using multiple loops
  63. get_posts output always same post
  64. how can I get seperate the HTML in the_content(); output?
  65. difference between querying database and using the loop
  66. Stomping WP_Query in author archive to facilitate pagination with custom queries
  67. How does WP generate the default $query in WP_Query based on the URL?
  68. how to get category`s slug in WP_Query loop?
  69. Loop posts based on permalink term
  70. How to remove only the latest sticky post from the loop
  71. How I can repeat 2 HTML templates in a WordPress Query?
  72. Does putting queries within loops cause an issue on WordPress?
  73. Query Taxonomy By Page Title
  74. Function using get_posts() with tax_query not working when called from functions.php
  75. How to get current page nearest parent id?
  76. Unable to paginate a custom page query
  77. How to change the default post type over the loop?
  78. How to make the ‘request’ filter work?
  79. How do I stop the same post showing multiple times in a archive?
  80. Bootstrap grid while loop
  81. how to get custom attachment url?
  82. How can I use WP_Query to sort ‘event’ custom post type by date?
  83. Display posts side by side with custom query
  84. WP_Query & Duplicate entries
  85. WordPress For Loop Prints Unwanted Extra Paragraph Element
  86. Calling a function with WP_Query only ever brings the first result
  87. query_posts() doesn’t seem to be called in my page
  88. Some doubts about how the main query and the custom query works in this custom theme?
  89. Ordering Posts by parent category, name ascending
  90. Create multiple sections for all categories and then queries all the posts for each of those categories
  91. Load 3 posts in flexslider slide [closed]
  92. Multiple wp_query loops showing first 5 posts on all pages instead of older posts[Resolved]
  93. Next / previous posts link doesn’t show up with Posts 2 Posts
  94. How to exclude posts ordered by comment_count from subsequent wordpress loops using WP_Query?
  95. $query conflicting with other queries in the same page
  96. WordPress Post Looping? [duplicate]
  97. Carousel Loop only duplicating
  98. How to show featured post first, then separate loop for other posts
  99. Woocommerce set loop_shop_columns to be 3 in the main shop page loop only and 4 otherwise
  100. Prevent WordPress loop from displaying similar post titles