NEW YORK (TheStreet) -- "I think that people forget that this is primarily the day when mutual funds come in and buy their stocks aggressively," said Jim Cramer on CNBC's "Stop Trading!" segment on Thursday.

For example, he said he expected

Apple

(AAPL) - Get Report

"to blow out" and go back to $170, and he saw "aggressive buying" in

Bank of America

(BAC) - Get Report

.

As for hedge fund manager John Paulson's buying of

Citigroup

(C) - Get Report

, Cramer called it "the most important story" and said Paulson "is the best." "The man who understood mortgages and knew to short them is buying a bank that we know the biggest problem is mortgages," said Cramer. "The No. 1 smartest mortgage guy is taking Citi!"

Cramer said that in talking to

Ultra Petroleum

CEO Michael Watford, Watford indicated that a "major change" was afoot in Washington, and natural gas would become the preferred fuel for federal cars and trucks. "That's why you see

Clean Energy

(CLNE) - Get Report

ramping," said Cramer.

With news that

Boeing

(BA) - Get Report

expects its Dreamliner plane to fly by the end of the year, Cramer offered up a few ancillary plays, including

Honeywell

(HON) - Get Report

, which he owns for his

Action Alerts PLUS

charitable trust;

Alcoa

(AA) - Get Report

, "a giant maker of fasteners"; and

Precision Castparts

(PCP)

, which he said is "almost entirely aerospace."

-- Written by Rebecca Corvino in New York.

(Editor's note: At the time of publication, Cramer owned Honeywell and Bank of America for his Action Alerts PLUS charitable trust.)