Speculation is as old as the hills, excerpt from J.Livermore

The following excerpt is from my favorite book, "Reminiscences of a stock operator" by Jesse Livermore. I posted this before. In summary, this one is about manipulators and whales trying to test the strength of the sugar market through large market buy and sell orders.

It was in the old days when Sugar was one of the most continuous purveyors of fireworks in the market. H. O. Havemeyer, president of the company, was in the heyday of his power. I gather from talks with the old-timers that H. O. and his following had all the resources of cash and cleverness necessary to put through successfully any deal in their- own stock. They tell me that Havemeyer trimmed more small professional traders in that stock than any other insider in. any other stock. As a rule, the floor traders are more likely to thwart the insiders' game than help it. 

One day a man who knew Deacon White rushed into the office all excited and said, "Deacon, you told me if I ever got any good information to come to you at once with it and if you used it you'd carry me for a few hundred shares." He paused for breath and for confirmation. 

The deacon looked at him in that meditative way he had and said, "I don't know whether I ever told you exactly that or not, but I am willing to pay for information that I can use." 

"Well, I've got it for you." 

"Now, that's nice," said the deacon, so mildly that the man with the info swelled up and said, "Yes, sir, deacon." Then he came closer so nobody else would hear and said, "H. O. Havemeyer is buying Sugar." 

"Is he ?" asked the deacon quite calmly. 

It peeved the informant, who said impressively: "Yes, sir. Buying all he can get, deacon." 

"My friend, are you sure?" asked old S. V. 

"Deacon, I know it for a positive fact. The old inside gang are buying all they can lay their hands on. It's got something to do with the tariff and there's going to be a killing in the common. It will cross the preferred. And that means a sure thirty points for a starter." 

"D' you really think so?" And the old man looked at him over the top of the old-fashioned silver-rimmed spectacles that he had put on to look at the tape. 

"Do I think so? No, I don't think so; I know so. Absolutely ! Why, deacon, when H. O. Havemeyer and his friends buy Sugar as they're doing now they're never satisfied with anything less than forty points net. I shouldn't be surprised to see the market get away from them any minute and shoot up before they've got their full lines. There ain't as much of it kicking around the brokers' offices as there was a month ago." 

"He's buying Sugar, eh?" repeated the deacon absently. 

"Buying it? Why, he's scooping it in as fast as he can without putting up the price on himself." 

"So?" said the deacon. That was all. 

But it was enough to nettle the tipster, and he said, "Yes, sir-ree! And I call that very good information. Why, it's absolutely straight." 

"Is it?" 

"Yes; and it ought to be worth a whole lot. Are you going to use it?" 

"Oh, yes. I'm going to use it." 

"When?" asked the information bringer suspiciously. 

"Right away." And the deacon called: -"Frank!" It was the first name of his shrewdest broker, who was then in the adjoining room. 

"Yes, sir," said Frank. 

"I wish you'd go over to the Board and sell ten thousand Sugar." 

"Sell?" yelled the tipster. There was such suffering in his voice that Frank, who had started out at a run, halted in his tracks. 

"Why, yes," said the deacon mildly. 

"But I told you H. O. Havemeyer was buying it!" 

"I know you did, my friend," said the deacon calmly; and turning to the broker: "Make haste, Frank!" 

The broker rushed out to execute the order and the tipster turned red. 

"I came in here," he said furiously, "with the best information I ever had. I brought it to you because I thought you were my friend, and square. I expected you to act on it." 

"I am acting on it," interrupted the deacon in a tranquillising voice. 

"But I told you H. O. and his gang were buying!" 

"That's right. I heard you." 

"Buying! Buying! I said buying!" shrieked the tipster. 

"Yes, buying! That is what I understood you to say," the deacon assured him. He was standing by the ticker, looking at the tape. 

"But you are selling it." 

"Yes; ten thousand shares." And the deacon nodded. "Selling it, of course." 

He stopped talking to concentrate on the tape and the tipster approached to see what the deacon saw, for the old man was very foxy. While he was looking over the deacon's shoulder a clerk came in with a slip, obviously the report from Frank. The deacon barely glanced at it. He had seen on the tape "how his order had been executed. 

It made him say to the clerk, "Tell him to sell another ten thousand Sugar." 

"Deacon, I swear to you that they really are buying the stock!" 

"Did Mr. Havemeyer tell you?" asked the deacon quietly. 

"Of course not! He never tells anybody anything. He would not bat an eyelid to help his best friend make a nickel. But I know this is true." 

"Do not allow yourself to become excited, my friend." And the deacon held up a hand. He was looking at the tape. The tip-bringer said, bitterly: 

"If I had known you were going to do the opposite of what I expected I'd never have wasted your time or mine. But I am not going to feel glad when you cover that stock at an awful loss. I'm sorry for you, deacon. Honest! If you'll excuse me I'll go elsewhere and act on my own information." 

"I'm acting on it. I think I know a little about the market; not as much, perhaps, as you and your friend H. O. Havemeyer, but still a little. What I am doing is what my experience tells me is the wise thing to do with the information you brought me. After a man has been in Wall Street as long as I have he is grateful for anybody who feels sorry for him. Remain calm, my friend." 

The man just stared at the deacon, for whose judgment and nerve he had great respect. 

Pretty soon the clerk came in again and handed a report to the deacon, who looked at it and said: "Now tell him to buy thirty thousand Sugar. Thirty thousand!" 

The clerk hurried away and the tipster just grunted and looked at the old gray fox. 

"My friend," the deacon explained kindly, "I did not doubt that you were telling me the truth as you saw it. But even if I had heard H. O. Havemeyer tell you himself, I still would have acted as I did. For there was only one way to find out if anybody was buying the stock in the way you said H. O. Havemeyer and his friends were buying it, and that was to do what I did. The first ten thousand shares went fairly easily. It was not quite conclusive. But the second ten thousand was absorbed by a market that did not stop rising. The way the twenty thousand shares were taken by somebody proved to me that somebody was in truth willing to take all the stock that was offered. It doesn't particularly matter at this point who that particular somebody may be. So I have covered my shorts and am long ten thousand shares, and I think that your information was good as far as it went." 

"And how far does it go?" asked the tipster. 

"You have five hundred shares in this office at the average price of the ten thousand shares," said the deacon. "Good day, my friend. Be calm the next time." 

TLDR: big spenders doing market sells to "test" the market to see if there really are buyers. if there are buyers for these test market sells then they will conduct their market buys.