[THE INVESTOR] More than 80 percent of companies listed on the tech-heavy KOSDAQ did not hold a single investor relations event last year, Korea Exchange said on June 29. According to Korea Exchange’s analysis, 948 of the 1,151 KOSDAQ companies did not hold any investor relations events in 2015. The figures are based on regulatory filings posted on the Financial Supervisory Service’s Data Analysis, Retrieval and Transfer System.Such neglect of communication with investors was displayed regardles