Are stock purchases on NASDAQ trackable to personal information?
In the United States, when key people in a company buy or sell shares there are reporting requirements.  The definition of key people includes people like the CEO, and large shareholders. There are also rules that can lock out their ability to buy and sell shares during periods where their insider knowledge would give them an advantage. These reporting rules are to level the playing field regarding news that will impact the stock price.  These rules are different than the reporting rules that the IRS has to be able to tax capital gains. These are also separate than the registration rules for the shares so that you get all the benefits of owning the stock (dividends, voting at the annual meeting, voting on a merger or acquisition). The broker will probably submit records to the IRS, so there isn't anonymity at that level...
The reason for such differences is that there's no source to get this information. The companies do not (and cannot) report who are their shareholders except for large shareholders and stakes of interest. These, in the case of GoPro, were identified during the IPO (you can look the filings up on EDGAR). You can get information from this or that publicly traded mutual fund about their larger holdings from their reports, but private investors don't provide even that. Institutional (public) investors buy and sell shares all the time and only report large investments. So there's no reliable way to get a snapshot picture you're looking for. This is going to be a bit of a shameless plug, but I've build a portfolio tracking website to track your portfolio and be able to share it (in read-only mode) as  well. It is at http://frano.carelessmusings.com and currently in beta. Most portfolio trackers are behind a login wall and thus will lack the sharing function you are looking for. Examples of these are: Yahoo Finance, Google Finance, Reuters Portfolios, MorningStart Portfolios, and many others. Another very quick and easy solution (if you are not trading too often) is a shared google docs spreadsheet. Gdocs has integration with google finance and can retrieve prices for stocks by symbol. A spreadsheet can contain the following: Symbol, Quantity, Avg. Buy Price, Price, P/L, P/L% and so on. The current price and P/L data can be functions that use the google finance API. Hope this helps, and if you check out my site please let me know what you think and what I could change. "Are there any known protections against obvious typos in the stock systems themselves? Do you know of stock exchanges which flags or rejects obviously wrong buy or sell orders (e.g., selling something for 0.1% of its highest buy order, or buying something at 1000 times the current sell order)? Does the stock exchange ""community"" have some sort of ""rules of conduct"" for this? Yes and No. Most Stock Exchanges for certain set of stocks have circuit breakers that are more to restrict panic selling or artificial drop in prices. The kind of controls you are mentioning can't be put on individual trades; as stock exchanges are meant to guarantee / provide neutral ground for the price to be determined by demand / supply. There are quite a few companies that have quickly lost value and become worthless with a day or two. Hence it becomes difficult to determine if something is error by an individual or not. Once an order is submitted to the exchange, it can't afford the to and fro to verify ... as even few seconds make a different in volatile markets. The kind of errors reported are difficult for an individual to make as he would not own the kind of stocks and the stock broker will stop the trade from being placed." "One scenario described in the original question -- a non-insider who trades after informal conversations with friends, where no insiders directly benefit from any such disclosure -- might not be illegal.  (IANAL -- this is just my personal interpretation of articles in the news recently.) http://www.bloomberg.com/news/articles/2015-10-05/insider-trading-cases-imperiled-as-top-u-s-court-spurns-appeal the appeals court said prosecutors needed to show that the person disclosing the information received a clear benefit -- something more than the nurturing of a friendship ... In a 1980 case the Supreme Court rejected the idea of “a general duty between all participants in market transactions to forgo actions based on material, nonpublic information.""" I would at least encrypt the part of the drive you keep forms like that, but not to protect myself from the odd villain who works for the IRS.   Your broker does report your capital gains to the IRS, whether in sales or dividends.   I received a bill last month from the IRS for dividends I forgot to report on my 2013 return. The bill contained a partial duplicate of my 1099-DIV form from the brokerage, and included account numbers and SSN. Therefore it's safe to say IRS employees don't need to hack your laptop in order to get that info. :) As for minimum information, it depends on your broker. Call them and ask; they'll tell you everything you need to know.  Vanguard, for example, has some security questions, among other things. "Getting ""physical stocks"" will in most cases only be for the ""fun of it"". Most stocks nowadays are registered electronically and thus the physical stock will be of no value - it will just be a certificate saying that you own X amount of shares in company X; but this information is at the same time registered electronically. Stocks are not like bearer bonds, the certificate itself contains no value and is registered to each individual/entity. Because the paper itself is worthless, stealing it will not affect your amount of stock with the company.  This is true for most stocks - there may exist companies who live in the 70s and do not keep track of their stock electronically, but I suspect it will only be very few (and most likely very small and illiquid companies)." No, this is not generally possible, as each security purchase is booked as a separate order => hence separate transaction. You can do this through purchasing of a fund, i.e.: purchasing one share of a ETF will get you a relative share of the ETF holdings, but the actual holdings are not up to you then. That's up to you. If you instruct your broker to sell shares purchased in specific lots, they can do that -- but doing so requires that you and/or they track specific fractional lots forever afterwards so you know what is still there to be sold. FIFO simplifies the bookkeeping. And I am not convinced selecting specific lots makes much difference; the government gets its share of your profits sooner or later. No. If you didn't specify LIFO on account or sell by specifying the shares you wish sold, then the brokers method applies.  From Publication 551 Identifying stock or bonds sold.   If you can adequately identify the   shares of stock or the bonds you sold, their basis is the cost or   other basis of the particular shares of stock or bonds. If you buy and   sell securities at various times in varying quantities and you cannot   adequately identify the shares you sell, the basis of the securities   you sell is the basis of the securities you acquired first. For more   information about identifying securities you sell, see Stocks and   Bonds under Basis of Investment Property in chapter 4 of Pub. 550. The trick is to identify the stock lot prior to sale. "Yes! What you are describing is an ""off-exchange"" trade and can be done using stock certificates. Here, you will privately negotiate with the seller on a price and delivery details. That is the old-school way to do it. Many companies (about 20% of the S&P 500) will not issue paper certificates and you may run a hefty printing fee up to $500 (source: Wikipedia, above). Other other type of private-party transactions include a deal negotiated between two parties and settled immediately or based on a future event. For example, Warren Buffet created a deal with Goldman Sachs where Warren would have the choice to purchase GS shares in the future at a certain price. This was to be settled with actual shares (rather than cash-settled). Ignoring that he later canceled this agreement, if it were to go through the transaction would still have been handled by a broker transferring the shares. You can purchase directly from a company using a direct stock purchase plan (SPP). Just pick up the phone, ask for their investor relations and then ask if they offer this option. If not, they will be glad for your interest and look into setting it up for you." "The answer to your question is ""no"". Unless you specifically ask to receive paper share certificates, then brokers will hold your shares with a custodian company in the broker's own nominee account.  If you are able to receive paper certificates, then the registrar of the company whose shares you own will have a record of your name, however this is exceptionally rare these days.  Using a stockbroker means that your shares will be held in the broker's nominee account. A nominee company is a custodian charged with the safekeeping of investors’ securities. It should be a separate entity from the broker itself. In essence, the nominee is the legal owner of the securities, while you retain actual ownership as the beneficiary. Your broker can move and sell the securities on your behalf – and gets to handle all the lovely paperwork – but the assets still belong to you. They can’t be claimed by the broker’s creditors if things get messy. The main reason for this kind of set-up is cost, and this is why brokers are able to offer relatively low dealing costs to their clients. You can, if you wish, ask your broker for an account that deals with paper share certificates. However, few brokers will offer such an account and it will mean that you incur much higher dealing costs and may mean that you cannot sell you shares without first submitting the paper certificates back to your stock broker.   Note that the stock exchange plays no role in recording ownership.  Nor does your broker's account with the clearing house." To supplement Ben's answer: Following 'smart money' utilizes information available in a transparent marketplace to track the holdings of professionals.  One way may be to learn as much as possible about fund directors and monitor the firms holdings closely via prospectus. I believe certain exchanges provide transaction data by brokers, so it may be possible for a well-informed individual to monitor changes in a firms' holdings in between prospectus updates.  An example of a play on 'smart money':  S&P500 companies are reviewed for weighting and the list changes when companies are dropped or added. As you know there are ETFs and funds that reflect the holdings of the SP500.  Changes to the list trigger  'binary events' where funds open or close a position. Some people try to anticipate the movements of the SP500 before 'smart money' adjusts their positions. I have heard some people define smart money as people who get paid whether their decisions are right or wrong, which in my opinion, best captures the term. This Udemy course may be of interest: https://www.udemy.com/tools-for-trading-investing/ Technically yes, but getting investigated also depends on the connection that can be established. If you learned something from information obtained at work or by affiliation (family/friend), you probably can't trade. If you (hypothetically) stumbled across information perhaps by eavesdropping or peeking on some stranger's conversation, it'd be hard to find the connection unless you went and told people how you came about it. "Does your job give you access to ""confidential information"", such that you can only buy or sell shares in the company during certain windows?  Employees with access to company financial data, resource planning databases, or customer databases are often only allowed to trade in company securities (or derivatives thereof) during certain ""windows"" a few days after the company releases its quarterly earnings reports.  Even those windows can be cancelled if a major event is about to be announced.  These windows are designed to prevent the appearance of insider trading, which is a serious crime in the United States. Is there a minimum time that you would need to hold the stock, before you are allowed to sell it?  Do you have confidence that the stock would retain most of its value, long enough that your profits are long-term capital gains instead of short-term capital gains? What happens to your stock if you lose your job, retire, or go to another company? Does your company's stock price seem to be inflated by any of these factors: If any of these nine warning flags are the case, I would think carefully before investing. If I had a basic emergency fund set aside and none of the nine warning flags are present, or if I had a solid emergency fund and the company seemed likely to continue to justify its stock price for several years, I would seriously consider taking full advantage of the stock purchase plan.  I would not invest more money than I could afford to lose. At first, I would cash out my profits quickly (either as quickly as allowed, or as quickly as lets me minimize my capital gains taxes).  I would reinvest in more shares, until I could afford to buy as many shares as the company would allow me to buy at the discount. In the long-run, I would avoid having more than one-third of my net worth in any single investment.  (E.g., company stock, home equity, bonds in general, et cetera.)" Yes, add the stocks/mutual funds that you want and then you would just need to add all the transactions that you theoretically would have made. Performing the look up on the price at each date that you would have sold or bought is quite tedious as well as adding each transaction.