If history is a guide, this bull market is coming close to an end.???Shell also points to catalysts like the Fed tapering, Syria crisis, new Fed chair appointment and debt-ceiling as potential hurdles to a continued equity rally.The Vanguard FTSE Emerging Markets ETF (VWO) is ???due for a bit of a breather??? after falling 11% year-to-date in anticipation to an end to easy money, Matt Reiner, port