ini menunjukkan bahwa terdapat perbedaan harga saham dan volume perdagangan saham sebelum dan sesudah stock split yang signifikan. Terdapat penurunan rata-rata harga saham dari 7.573 menjadi 1.432 dan peningkatan rata-rata volume perdagangan saham dari 9.106.462 lembar saham menjadi 20.983.526 lembar saham. Sementara hasil dalam penelitian ini tidak berhasil menunjukkan adanya perbedaan frekuensi perdagangan saham sebelum dan sesudah stock split. Rata-rata frekuensi perdagangan saham sebelum stock split adalah 546 kali menjadi 746 kali sesudah stock split.Katakunci: stock split, harga saham, volume perdagangan saham, frekuensi perdagangan saham The objective of this research is to examine the differences in stock price, volume of stock trading, and frequency of stock trading before and after stock split. The population of this research includes companies listed on the Indonesia Stock Exchange on 2007-2011 which samples amounted to 36 obtained by purposive sampling method.The data is analyzed using Wilcoxon Signed-Rank Test. The results of this research show that there are differences in the stock price and volume of stock trading before and after the stock split, and the differences are significant. There is a decrease in the average of stock price of 7.573 to 1.432 and an increase in the average of volume of stock trading of 9.106.462 shares to 20.983.526 shares. While there is no difference in frequency of stock trading before and after the stock split.The average of frequency of stock trading before stock split is 746 times to 546 times after stock split.Keywords: stock split, stock price, volume of stock trading, frequency of stock trading