Why do you think there's a downtrend ahead? What are you using to measure a downtrend, the USD$ value of stocks? Gold? Barrels of oil? Dollars of labour?
Really, its all a matter of measurement. Measured against labour, the stock market has been in an epic bull run almost uninterrupted since the 1970s.
Measured against gold, the stock market has been in a secular bear market.
Measured against oil, the stock market has been in a bear market till recently.
Trends can be up or down, depending upon your point of view. Dumping printed money into banking black holes can be interpreted as creating inflation, which means that the market may very well continue to go up in USD$ terms, it probably will not make any meaningful gains in gold or oil, and probably not in labour either.