The initial public offering (IPO) of M K Sons Fine Jewels opened for bidding today, with the issue receiving 11 percent subscription by 11:15 am on October 28, as per the NSE data. The Rs 275.4-crore IPO received bids for 12,54,890 shares against 1,19,00,000 shares on offer. The national institutional investors led the demand with 31 percent subscription, followed by retail investors with 8 percent subscription.