“The stock market has spoiled more appetites than bad cooking” is a slightly incorrect quotation by humorist WIll Rogers (1879-1935). The actual quote, recorded in a newspaper on November 9, 1929, is: “This Stock Market thing has spoiled more appetites lately than bad cooking.”
 
The word “lately” is important because Rogers was writing following the stock market crash in October 1929.
 
   
Wikipedia: Will Rogers
William Penn Adair “Will” Rogers (November 4, 1879 – August 15, 1935) was a Cherokee cowboy, comedian, humorist, social commentator, vaudeville performer and actor. He was the father of U.S. Representative and WWII veteran Will Rogers, Jr.
 
Known as Oklahoma’s favorite son, Rogers was born to a prominent Indian Territory family. He traveled around the world three times, made 71 movies (50 silent films and 21 “talkies”), wrote more than 4,000 nationally-syndicated newspaper columns, and became a world-famous figure.
 
By the mid-1930s, Rogers was adored by the American people, and was the top-paid movie star in Hollywood at the time. Rogers died in 1935 with aviator Wiley Post, when their small airplane crashed near Barrow, Alaska Territory.
 
Google News Archive
9 November 1929, Spartanburg (SC) Herald-Journal, pg. 21, col. 2:
Will Rogers Gives Eddie Cantor Some Money to Invest In Market.
Well all I know is just what I read in the Papers. Awful lot of news percolating here and there. This Stock Market thing has spoiled more appetites lately than bad cooking.