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Welcome to the one year anniversary of the Brexit vote. Welcome also to the annual Russell rebalance, traditionally one of the busiest trading days of the year: according to Bloomberg, last year's rebalance helped propel a near record turnover of over 15 billion shares, as a result of the $8.5 trillion in stocks linked to the various Russell indices, many of which will be forced to find new owners after today's index recomposition. In fact, in four of the last five years, reconstitution day ranked in the 10 busiest trading sessions.

US equity futures were marginally in the red, while Asian markets rose and European stocks dropped. WTI oil rose 0.6% to $42.79 as some suggest the time to go long has arrived; oil tumbled 2.3% in the previous session. The Bloomberg Dollar Spot Index fell 0.1 percent.

Here are the main market developments while you were sleeping.

In an eventful overnight session which saw a historic transition in Saudi Arabia, an unexpected Republican victory in the Georgia Special Election, China's inclusion in the MSCI EM index and Travis Kalanick's resignation, S&P futures continued to fall, alongside stock markets in Asia and Europe, while oil prices extended their drop despite a larger than expected draw reported by API on Tuesday.

European stocks were flat after starting off strongly earlier, dragged lower by energy stocks. Asian stocks, U.S. futures little changed as oil tumbled with Brent tumbling as low as $45.85/bbl to the lowest intraday since November 30 and taking out a 38.2% Fib support, after a one-minute spike in volume to a day-high 5,208 lots just after 6am, with WTI mirroring Brent's momentum, and falling as much as 98c to $43.22, lowest since November 14.

S&P futures rose 0.3% in subdued trading with Dow Jones futs once again in record territory as European stocks jump 0.6% following Sunday's landslide victory for Macron's party in the French parliamentary elections and as Brexit negotiations are set to officially roll out on Monday.