"Since this data also comes from FINRA, what gives? The daily short selling volume is misleading because market makers and principal trading firms report a large number of trades as short sales in positions that they quickly cover. For market makers with a customer order to sell, they will temporarily sell short (which gets published to the tape as a media transaction for public dissemination) and then immediately buy from their customer in a non-media transaction that is not publicly disseminated to avoid double counting share volumes. SEC guidance also mandates that almost all principal trading firms that provide liquidity at multiple price levels, or arbitrage international securities, must mark orders they enter as short, even though those firms might also have strategies that tend to flatten by end of day. Since the trade reporting process for market makers and principal trades makes the Daily Short Volume easily misleading, we do not display it on www.otcmarkets.com."
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