[ABSTRAK
Penelitian ini bertujuan untuk menguji pengaruh IPO underpricing dan kepemilikan blockholder terhadap aftermarket liquidity IPO di Indonesia. Penelitian ini menggunakan tiga pengukuran likuiditas yaitu trading volume, bid ask spread dan illiquidity. Pengujian ini dilakukan sebanyak 116 perusahaan termasuk perusahan keuangan yang melakukan IPO dan tercatat di Bursa Efek Indonesia selama periode 2006-2014. Hasil penelitian ini membuktikan bahwa IPO underprcing berpengaruh positif dan signifikan terhadap aftermarket liquidity IPO. Kepemilikan blockholder terhadap aftermarket liquidity.;

---

ABSTRACT
The objective of this research is to analyze the effect of IPO Underpricing and Blockholders Ownership on Aftermarket Liquidity IPO in Indonesia. This research uses multiple regsression with 116 companies including finance company listed at Indonesia Stock Exchange taken as a sampel. The result of this research shows that IPO Underpricing have positive effect and significantly influence aftermarket liquidity. Blockholders ownership do not influence aftermarket liquidity IPO in Indonesia., The objective of this research is to analyze the effect of IPO Underpricing and Blockholders Ownership on Aftermarket Liquidity IPO in Indonesia. This research uses multiple regsression with 116 companies including finance company listed at Indonesia Stock Exchange taken as a sampel. The result of this research shows that IPO Underpricing have positive effect and significantly influence aftermarket liquidity. Blockholders ownership do not influence aftermarket liquidity IPO in Indonesia.]