Ljubljana, 18 April - The SBI TOP index of blue chips on the Ljubljana Stock Exchange closed 0.1% lower at 1,415.77 points on Thursday, as the telco Telekom Slovenije was the biggest loser, shedding 1.41%. Shares of the NLB bank, which gained 0.48%, were the most coveted today, accounting for half of the daily total turnover of EUR 1.85 million.