1 The typical holding period for most sells should be four months or less, preferably one month or less, even more preferably one week or even daily. 2  The taxpayer should spend a good part of most every day watching and trading the markets during trading hours.
Here we explain various used meanings for MMDD as acronym, abbreviation or texting slang word.
In brief NDD (No Dealing Desk) means or implies that the trades you do are being carried out directly into the market, with no interference from the trading house or broker you use. This is exactly the same for STP (Straight Through Processing) and DMA (Direct Market Access).