 In total the firm monitors on a daily basis $3.7 trillion worth of assets from mutual funds and exchange-traded funds because these fund flows can be used as a contrarian indicator in trading strategies.Other factors that can reflect or influence demand are margin debt, short interest, trends in savings vehicles, equity mutual fund cash levels, commitments of traders data, the VIX, put/call ratios, and investor sentiment surveys.The TrimTabs Demand Index (TTDI) uses regression analysis of fund flow and sentiment variables for intermediate-term market timing.