You know a rally is moving into overdrive when it exceeds even the imagination of Wall Street stock forecasters.
Equity strategists, a group not exactly known for their skepticism, are seeing their best guesses left for dead as the S&P 500 Index piles on gain after gain, including five straight weekly rallies. At 2,553, the benchmark gauge now sits 53 points above the most optimistic of the 18 predictions that Bloomberg compiled at the start of 2017.