speculate in

基本解释

While I suss that out, feel free to speculate in the comments section.
当我想明白时，去推测结论部分就感觉到很轻松。
We will do whatever we can to reduce the opportunities to speculate in the stock and futures markets.
我们将尽一切力量，减少投机者在证券和期货市场兴波作浪的机会。
October: This is one of the peculiarly dangerous months to speculate in stocks. The others are July, January, September, April, November, May, March, June, December, August and February.
月、五月、三月、六月、十二月、八月和二月。

In light of the Pakistani Taliban's alleged involvement, some speculate there could be a shift in US policy toward Pakistan.

But the point is that Obama has the money to speculate in states like North Carolina.
NPR: States' Party Allegiances Shifty
So government insured deposits still could not be used to speculate in riskier investment banking activities.
FORBES: President Obama Offers A Repeat Of His Same Failed Policies
The Federal Reserve is doing almost everything in its power to entice investors to speculate in overpriced asset markets.
FORBES: The Real Money Is Going Under The Mattress