Bid Ask Stock Quotes

Several years ago, researchers at the University of Minnesota identified 568 men and women over the age of seventy who were living independently but were at high risk of becoming disabled because of chronic health problems, recent illness, or cognitive changes. With their permission, the researchers randomly assigned half of them to see a team of geriatric nurses and doctors—a team dedicated to the art and science of managing old age. The others were asked to see their usual physician, who was notified of their high-risk status. Within eighteen months, 10 percent of the patients in both groups had died. But the patients who had seen a geriatrics team were a quarter less likely to become disabled and half as likely to develop depression. They were 40 percent less likely to require home health services. These were stunning results. If scientists came up with a device—call it an automatic defrailer—that wouldn’t extend your life but would slash the likelihood you’d end up in a nursing home or miserable with depression, we’d be clamoring for it. We wouldn’t care if doctors had to open up your chest and plug the thing into your heart. We’d have pink-ribbon campaigns to get one for every person over seventy-five. Congress would be holding hearings demanding to know why forty-year-olds couldn’t get them installed. Medical students would be jockeying to become defrailulation specialists, and Wall Street would be bidding up company stock prices. Instead, it was just geriatrics. The geriatric teams weren’t doing lung biopsies or back surgery or insertion of automatic defrailers. What they did was to simplify medications. They saw that arthritis was controlled. They made sure toenails were trimmed and meals were square. They looked for worrisome signs of isolation and had a social worker check that the patient’s home was safe. How do we reward this kind of work? Chad Boult, the geriatrician who was the lead investigator of the University of Minnesota study, can tell you. A few months after he published the results, demonstrating how much better people’s lives were with specialized geriatric care, the university closed the division of geriatrics.

The fragility of the US economy had nearly destroyed him. It wasn't enough that Citadel's walls were as strong and impenetrable as the name implied; the economy itself needed to be just as solid. Over the next decade, he endeavored to place Citadel at the center of the equity markets, using his company's superiority in math and technology to tie trading to information flow. Citadel Securities, the trading and market-making division of his company, which he'd founded back in 2003, grew by leaps and bounds as he took advantage of his 'algorithmic'-driven abilities to read 'ahead of the market.' Because he could predict where trades were heading faster and better than anyone else, he could outcompete larger banks for trading volume, offering better rates while still capturing immense profits on the spreads between buys and sells. In 2005, the SEC had passed regulations that forced brokers to seek out middlemen like Citadel who could provide the most savings to their customers; in part because of this move by the SEC, Ken's outfit was able to grow into the most effective, and thus dominant, middleman for trading — and especially for retail traders, who were proliferating in tune to the numerous online brokerages sprouting up in the decade after 2008. Citadel Securities reached scale before the bigger banks even knew what had hit them; and once Citadel was at scale, it became impossible for anyone else to compete. Citadel's efficiency, and its ability to make billions off the minute spreads between bids and asks — multiplied by millions upon millions of trades — made companies like Robinhood, with its zero fees, possible. Citadel could profit by being the most efficient and cheapest market maker on the Street. Robinhood could profit by offering zero fees to its users. And the retail traders, on their couches and in their kitchens and in their dorm rooms, profited because they could now trade stocks with the same tools as their Wall Street counterparts.

Transaction Costs. Transaction costs are a broad, sweeping category and can be broken down further into categories such as brokerage commissions, market impact costs (the cost of moving the market as mutual funds trade massive market-moving positions), and spread costs (the difference between the bid-and-ask or the buy-and-sell price of a stock).

You sell to the bid, and you buy from the ask.

has a bid price and an offer (or "ask") price. The bid is the price at which someone is willing to buy the stock. The offer is the price at which someone is willing to sell the stock.

2. Don’t trade penny stocks. A penny stock is any stock that trades under $5. Unless you are an advanced trader, you should avoid all penny stocks. I would extend this by encouraging you to also avoid all stocks priced under $10. Even if you have a small trading account ($5,000) or less, you are better off buying fewer shares of a higher-priced stock than a lot of shares of a penny stock. That is because low-priced stocks are most often associated with lower quality companies. As a result, they are not usually allowed to trade on the NYSE or the Nasdaq. Instead, they trade on the OTCBB ("over the counter bulletin board") or Pink Sheets, both of which have much less stringent financial reporting requirements than the major exchanges do. Many of these companies have never made a profit. They may be frauds or shell companies that are designed solely to enrich management and other insiders. They may also include former “blue chips” that have fallen on hard times like Eastman Kodak or Lehman Brothers. In addition, penny stocks are inherently more volatile than higher-priced stocks. Think of it this way: if a $100 stock moves $1, that is a 1% move. If a $5 stock moves $1, that is a 20% move. Many new traders underestimate the kind of emotional and financial damage that this kind of volatility can cause. In my experience, penny stocks do not trend nearly as well as higher-priced stocks. They tend to be more mean-reverting (Mean reversion occurs when a stock moves up sharply from its average trading price, only to fall right back down again to its average trading price). Many of them are eventually headed to zero, but they are still not good short candidates. Most brokers will not let you short them. And even if you do find a broker who will let you short a penny stock, how would you like to wake up to see your penny stock trading at $10 when you just shorted it at $2 a few days before? I learned that lesson the hard way. It turned out that I was risking $8 to make $2, which is not a good way to make money over the long term. To add injury to insult, a penny stock might appear to be liquid one day, and the next day, the liquidity dries up and you are confronted by a $2 bid/ask spread. Or the bid might completely disappear. Imagine owning

To illustrate the losses from market impact, suppose XYZ stock has a “true” price of $50 a share. Assuming for simplicity that it trades in 10-cent increments, between trades there will be buyers bidding for various amounts at $49.90, $49.80, $49.70, and so forth. Similarly, sellers will be asking $50.10, $50.20, et cetera. Someone who places an order to buy at whatever price is available in the market, called a market order and one of the most common types, will pay $50.10, a little above the true price. This 10-cent difference between the price paid and the “true” price is called market impact. Market impact increases with order size since, to continue our example, a large market order may clean out not only the offering at $50.10 but also stock offered for sale at higher prices, resulting in an average purchase price above $50.10 and a market impact greater than 10 cents per share. When Steve Mizusawa and I operated Ridgeline Partners, we reduced these costs by dividing large orders into smaller ones of $20,000 to $100,000, and waiting a few minutes between transactions to allow the market price to recover. We know the “true” price is somewhere at or between the highest bid price (the Bid) and the lowest asking price (the Offer), but not exactly where. On average, it is about halfway between the two. To see that market impact is a real cost, suppose in our example that just after buying stock at $50.10 the buyer wants to sell it at market. He gets $49.90, for an immediate loss of 20 cents or about 0.4 percent.

This is because every stock has a bid price and an offer (or "ask") price. The bid is the price at which someone is willing to buy the stock. The offer is the price at which someone is willing to sell the stock. Memorize this phrase right now: “You sell to the bid, and you buy from the ask.