U.S. stock futures slide; all down >1% Euro STOXX 600 index down ~1.4%; was off 2.6% at low Dollar slips; gold ~flat; crude, bitcoin decline U.S. 10-Year Treasury yield ~1.40% Dec 20 - Welcome to the home for real-time coverage of markets brought to you by Reuters reporters. You can share your thoughts with us at markets.research@thomsonreuters.com DOW INDUSTRIALS: SICK AGAIN (0900 EST/1400 GMT) U.S. equity index futures are tumbling on Monday, dragged down by fears over tighter restrictions on the global economy, as a result of the Omicron variant. Given action in CBT e-mini Dow futures , the Dow Jones Industrial Average (.DJI) is poised to slide more than 400 points when regular-session trading kicks off. This relapse is occurring after the blue-chip average failed to register a close above the 76.4%/78.6% Fibonacci retracement zone of its November-December slide at 35,961.87/36,018.16, keeping alive the potential that its December bounce was counter-trend read more : Dow12202021 Dow12202021 With early weakness Monday, the DJI can once again threaten its rising 200-day moving average (DMA), which ended Friday around 34,605. Key support resides at a broken log-scale resistance line from 1929, which now comes in around 34,100, and the Dow"s Dec. 1 low, which is at 34,006.98. Closing below this support zone can suggest the potential for a much greater decline, given that trend line has subsequently contained Dow weakness since it was first overwhelmed in March. A reversal back over the 50-DMA, however, which ended Friday around 35,545, can see the Dow make another go at the Fibonacci barrier. read more (Terence Gabriel) ***** FOR MONDAY"S LIVE MARKETS" POSTS PRIOR TO 0900 EST/1400 GMT - CLICK HERE: read more Terence Gabriel is a Reuters market analyst. The views expressed are his own