You should also contact the creditor or other information provider in writing and tell them that you dispute an item. (fidelity.com)
You should also tell the creditor or other information provider in writing that you dispute an item. (avant.com)
Information regarding the intraday value of shares of the Fund, also known as the «indicative optimized portfolio value» («IOPV»), is disseminated every 15 seconds throughout the trading day by the national securities exchange on which the Fund's shares are listed or by market data vendors or other information providers. (libertyshares.com)