This may explain the "run up" to 1,200 before the plunge back to 1,000 or lower:
From Investopedia.com, definition of "window dressing"
"What Does Window Dressing Mean?
A strategy used by mutual fund and portfolio managers near the year or quarter end to improve the appearance of the portfolio/fund performance before presenting it to clients or shareholders. To window dress, the fund manager will sell stocks with large losses and purchase high flying stocks near the end of the quarter. These securities are then reported as part of the fund's holdings."
Certainly looks like it so far this week, with today being the last day of the quarter.