600. Who can truly afford luxury cars?
Most of the people I know that own them are slightly older, and thus in their prime earning years, and many have paid off their homes. That can free up $1000 a month or more in monthly expenses, which would easily cover a nice luxury car payment.  If you've got it, and are into cars, why not? What's the point in having the biggest tombstone in the graveyard?

601. give free budgeting advice
The counsel of a friend doesn't come with a legal or professional liability. The key to doing this sort of thing successfully is to respect boundaries. You are providing advice and discussion, not taking over your friend's life.

602. What happens if one brings more than 10,000 USD with them into the US?
Bad plan. This seems like a recipe for having your money taken away from you by CBP.  Let me explain the biases which make it so.  US banking is reliable enough for the common citizen, that everyone simply uses banks.  To elaborate, Americans who are unbanked either can't produce simple identity paperwork; or they got an account but then got blacklisted for overdrawing it. These are problems of the poor, not millionaires.  Outside of determined "off the grid" folks with political reasons to not be in the banking and credit systsm, anyone with money uses the banking system.  Who's not a criminal, anyway.  We also have strong laws against money laundering: turning cash (of questionable origin) into "sanitized" cash on deposit in a bank.  The most obvious trick is deposit $5000/day for 200 days. Nope, that's Structuring: yeah, we have a word for that.  A guy with $1 million cash, it is presumed he has no choice: he can't convert it into a bank deposit, as in this problem - note where she says she can't launder it.  If it's normal for people in your country to haul around cash, due to a defective banking system, you're not the only one with that problem, and nearby there'll be a country with a good banking system who understands your situation.  Deposit it there.  Then retain a US lawyer who specializes in this, and follow his advice about moving the money to the US via funds transfer. Even then, you may have some explaining to do; but far less than with cash.  (And keep in mind for those politically motivated off-the-financial-grid types, they're a bit crazy but definitely not stupid, live a cash life everyday, and know the law better than anybody. They would definitely consider using banks and funds transfers for the border crossing proper, because of Customs.  Then they'll turn it into cash domestically and close the accounts.)

603. Is it worth investing in Index Fund, Bond Index Fund and Gold at the same time?
Index funds can be a very good way to get into the stock market. It's a lot easier, and cheaper, to buy a few shares of an index fund than it is to buy a few shares in hundreds of different companies. An index fund will also generally charge lower fees than an "actively managed" mutual fund, where the manager tries to pick which stocks to invest for you. While the actively managed fund might give you better returns (by investing in good companies instead of every company in the index) that doesn't always work out, and the fees can eat away at that advantage. (Stocks, on average, are expected to yield an annual return of 4%, after inflation. Consider that when you see an expense ratio of 1%. Index funds should charge you more like 0.1%-0.3% or so, possibly more if it's an exotic index.) The question is what sort of index you're going to invest in. The Standard and Poor's 500 (S&P 500) is a major index, and if you see someone talking about the performance of a mutual fund or investment strategy, there's a good chance they'll compare it to the return of the S&P 500. Moreover, there are a variety of index funds and exchange-traded funds that offer very good expense ratios (e.g. Vanguard's ETF charges ~0.06%, very cheap!). You can also find some funds which try to get you exposure to the entire world stock market, e.g. Vanguard Total World Stock ETF, NYSE:VT). An index fund is probably the ideal way to start a portfolio - easy, and you get a lot of diversification. Later, when you have more money available, you can consider adding individual stocks or investing in specific sectors or regions. (Someone else suggested Brazil/Russia/Indo-China, or BRICs - having some money invested in that region isn't necessarily a bad idea, but putting all or most of your money in that region would be. If BRICs are more of your portfolio then they are of the world economy, your portfolio isn't balanced. Also, while these countries are experiencing a lot of economic growth, that doesn't always mean that the companies that you own stock in are the ones which will benefit; small businesses and new ventures may make up a significant part of that growth.) Bond funds are useful when you want to diversify your portfolio so that it's not all stocks. There's a bunch of portfolio theory built around asset allocation strategies. The idea is that you should try to maintain a target mix of assets, whatever the market's doing. The basic simplified guideline about investing for retirement says that your portfolio should have (your age)% in bonds (e.g. a 30-year-old should have 30% in bonds, a 50-year-old 50%.) This helps maintain a balance between the volatility of your portfolio (the stock market's ups and downs) and the rate of return: you want to earn money when you can, but when it's almost time to spend it, you don't want a sudden stock market crash to wipe it all out. Bonds help preserve that value (but don't have as nice of a return). The other idea behind asset allocation is that if the market changes - e.g. your stocks go up a lot while your bonds stagnate - you rebalance and buy more bonds. If the stock market subsequently crashes, you move some of your bond money back into stocks. This basically means that you buy low and sell high, just by maintaining your asset allocation. This is generally more reliable than trying to "time the market" and move into an asset class before it goes up (and move out before it goes down). Market-timing is just speculation. You get better returns if you guess right, but you get worse returns if you guess wrong. Commodity funds are useful as another way to diversify your portfolio, and can serve as a little bit of protection in case of crisis or inflation. You can buy gold, silver, platinum and palladium ETFs on the stock exchanges. Having a small amount of money in these funds isn't a bad idea, but commodities can be subject to violent price swings! Moreover, a bar of gold doesn't really earn any money (and owning a share of a precious-metals ETF will incur administrative, storage, and insurance costs to boot). A well-run business does earn money. Assuming you're saving for the long haul (retirement or something several decades off) my suggestion for you would be to start by investing most of your money* in index funds to match the total world stock market (with something like the aforementioned NYSE:VT, for instance), a small portion in bonds, and a smaller portion in commodity funds. (For all the negative stuff I've said about market-timing, it's pretty clear that the bond market is very expensive right now, and so are the commodities!) Then, as you do additional research and determine what sort investments are right for you, add new investment money in the places that you think are appropriate - stock funds, bond funds, commodity funds, individual stocks, sector-specific funds, actively managed mutual funds, et cetera - and try to maintain a reasonable asset allocation. Have fun. *(Most of your investment money. You should have a separate fund for emergencies, and don't invest money in stocks if you know you're going need it within the next few years).

604. Do I owe taxes if my deductions are higher than my income?
I'm going to echo Phil and say that you should add more information. That being said, I think it is possible for you to owe the government that much. If you received a federal health insurance subsidy and live in a state that didn't expand medicaid, you could have received a subsidy through out the year that you did not end up qualifying for. It appears you are outside the medicaid limit of 133% of the poverty level($11,670) or $15,521. If you received a subsidy of $275 a month from the marketplace, you would have received $3300 worth of aid from the government that you don't qualify for. Now they are expecting you to pay it back.

605. What to sell when your financial needs change, stocks or bonds?
You are right about the stock and index funds, with dollar cost averaging over several years, the daily price of the security (especially a dividend paying security) will not matter* because your position will have accumulated larger over several entry points, some entries with cheaper shares and some entries with more expensive shares. In the future your position will be so large that any uptick will net you large gains on your original equity. *not matter being a reference to even extreme forms of volatility. But if you had all your equity in a poor company and tanked, never to rise again, then you would still be in a losing position even with dollar cost averaging. If your only other holdings are bonds, then you MAY want to sell those to free up capital.

606. Why do stocks gap up after a buyout is announced?
The "random walk" that you describe reflects the nature of the information flow about the value of a stock.  If the flow is just little bits of relatively unimportant information (including information about the broader market and the investor pool), you will get small and seemingly random moves, which may look like a meander.  If an important bit of information comes out, like a merger, you will see a large and immediate move, which may not look as random. However, the idea that small moves are a meander of search and discovery and large moves are immediate agreements is incorrect.  Both small moves and large moves are instantaneous agreements about the value of a stock in the form of a demand/supply equilibrium.  As a rule, neither is predictable from the point of view of a single investor, but they are not actually random.  They look different from each other only because of the size of the movement, not because of an underlying difference in how the consensus price is reached.

607. Should I sell when my stocks are growing?
If you feel comfortable taking an 8% gain on your stocks, then yes, you should sell. It is generally a good idea to know when you want to sell (either a price or %) before you ever actually buy the stocks. That helps from getting emotional and making poor decisions.

608. Question about data from FTSE 100
Open, high, low, close, volume. The hint is that volume on new years day is 0.  DC's comment is actually a better answer than mine - when given any data set, you should really know the meaning of each cell/number.

609. Can someone help me understand my student loans?
First to actually answer the question "how long at these rates/payments?"-  These is nothing magic or nefarious about what the bank is doing. They add accrued interest and take your payment off the new total.  I'd make higher payments to the 8.75% debt until it's gone, $100/mo extra and be done. The first debt, if you bump it to $50 will be paid in 147 months, at $75/mo, 92 months. Everything you pay above the minimum goes right to the principal balance and gets you closer to paying it off.  The debt snowball is not the ideal way to pay off your debt. Say I have one 24% credit card the bank was nice enough to give me a $20,000 line of credit on. I also have 20 cards each with $1000 in credit, all at 6%. The snowball dictates that the smallest debt be paid first, so while I pay the minimum on the 24% card, the 6% cards get paid off one by one, but I'm supposed to feel good about the process, as I reduce the number of cards every few months.  The correct way to line up debt is to pay off the (tax adjusted) highest rate first, as an extra $100 to the 24% card saves you $2/mo vs 50 cents/mo for the 6% cards. I wrote an article discussing the Debt Snowball which links to a calculator where you can see the difference in methods. I note that if the difference from lowest to highest rate is small, the Snowball method will only cost you a small amount more. If, by coincidence, the balances are close, the difference will also be small.  The above aside, it's the rest of your situation that will tell you the right path for you. For example, a matched 401(k) deposit should take priority over most debt repayment. The $11,000 might be better conserved for a house downpayment as that $66/mo is student loan and won't count as the housing debt, rather "other debt" and part of the higher ratio when qualifying for the mortgage. If you already have taken this into account, by all means, pay off the 8.75% debt asap, then start paying off the 3% faster. Keep in mind, this is likely the lowest rate debt one can have and once paid off, you can't withdraw it again. So it's important to consider the big picture first.  (Are you depositing to a retirement account? Is it a 401(k) and are you getting any matching from the company?)

610. Does a stock's price represent current liquidation of all shares?
What if everyone decided to sell all the shares at a given moment, let's say when the stock is trading at $40? It would fall to the lowest bid price, which could be $0.01 if someone had that bid in place. Here is an example which I happened to find online:  Notice there are orders to buy at half the market price and lower... probably all the way down to pennies.  If there were enough selling activity to fill all of those bids you see, then the market price would be the lowest bid on the screen.  Alternatively, the bid orders could be pulled (cancelled), which would also let the price free-fall to the lowest bid even if there were few actual sellers. Bid-stuffing is what HFT (high frequency trading) algorithms sometimes do, which some say caused the Flash Crash of May 2010.  The computers "stuff" bids into the order book, making it look like there is demand in order to trigger a market reaction, then they pull the bids to make the market fall.  This sort of thing happens all the time and Nanex documents it http://www.nanex.net/FlashCrash/OngoingResearch.html Quote stuffing defined: http://www.investopedia.com/terms/q/quote-stuffing.asp I remember the day of the Flash Crash very well.  I found this video on youtube of CNBC at that time.  Watch from the 5:00 min mark on the video as Jim Crammer talks about PG easily not being worth the price of the market at that time.  He said "Who cares?", "Its not a real price", "$49.25 bid for 50,000 shares if I were at my hedge fund."  http://www.youtube.com/watch?v=86g4_w4j3jU You can value a stock how you want, but its only actually worth what someone will give you for it. More examples: Anadarko Petroleum, which as we noted in today's EOD post, lost $45 billion in market cap in 45 milliseconds (a collapse rate of $1 billion per millisecond), flash crashing from $90 all the way to an (allegedly illegal) stub quote of $0.01. http://www.zerohedge.com/news/2013-05-17/how-last-second-flash-crash-pushed-sp-500-1667-1666 How 10,000 Contracts Crashed The Market: A Visual Deconstruction Of Last Night's E-Mini Flash Crash http://www.zerohedge.com/news/2012-12-21/how-10000-contracts-crashed-market-visual-deconstruction-last-nights-e-mini-flash-cr Symantec Flash-Crash Destroys Over $1.5 Billion In Less Than A Second http://www.zerohedge.com/news/2013-04-30/symantec-flash-crash-destroys-over-15-billion-less-second This sort of thing happens so often, I don't pay much attention anymore.

611. When buying a call option, is the financial stability of the option writer relevant?
In the case of regulated, exchange-traded options, the writer of an options contract is obliged to maintain a margin with their broker, and the broker is obliged to maintain a margin with the clearing house.  (Institutional writers of options will deal directly with the clearing house.) In the event that the writer is unable to make a daily margin call, the broker (or clearing house) may automatically close out (all of) their positions using existing margin held.  If there was a shortfall, the broker (or clearing house) would be left to persue the client (writer) to make good on their obligations. None of this effects the position of the original buyer of the options contract.  Effectively, the buyer's counterparty is their broker's clearing house account.

612. Any Tips on How to Get the Highest Returns Within 4 Months by Investing in Stocks?
Invest in an etf called SPXS and hope for a market correction in the next month. Or if you know a lot about markets and trends, select from this list of leveraged etfs available from Direxion.

613. Can someone explain recent AAMRQ stock price behavior to me?
There are things that are clearly beyond me as well. Cash per share is $12.61 but the debt looks like $30 or so per share. I look at that, and the $22 negative book value and don't see where the shareholders are able to recoup anything.

614. Problems with Enterprise Value and better valuation techniques
This is a tough question SFun28.  Let's try and debug the metric. First, let's expand upon the notion share price is determined in an efficient market where prospective buyers and sellers have access to info on an enterprises' cash balance and they may weigh that into their decision making.  Therefore, a desirable/undesirable cash balance may raise or lower the share price, to what extent, we do not know.   We must ask How significant is cash/debt balance in determining the market price of a stock?   As you noted, we have limited info, which may decrease the weight of these account balances in our decision process. Using a materiality level of 5% of net income of operations, cash/debt may be immaterial or not considered by an investor. investors oftentimes interpret the same information differently (e.g. Microsoft's large cash balance may show they no longer have innovative ideas worth investing in, or they are well positioned to acquire innovative companies, or weather a contraction in the sector) My guess is a math mind would ignore the affect of account balances on the equity portion of the enterprise value calculation because it may not be a factor, or because the affect is subjective.

615. Gigantic point amount on rewards card - what are potential consequences?
An ideal option for you would be to use as many or as few as you choose, but have all of them available to you. The service desk guy told you you can do exactly that. Problem, though: you have no proof that a representative of the company told you that. Get proof. Recording, written statement, whatever. If writing a letter, make it clear you expect a response. The time you spend "being a good guy" is not free, you should get something for it. No idea how to go about that - mentioning the service desk guy in a letter might give him trouble. Maybe suggest that you could allow your image to be used in a short advertising campaign, as thanks. But whatever you do get, enjoy it. Consequences? Any number of things can happen, from lifetime free meals to court cases, negative points and being banned, regardless of who is right, legally or morally. Someone in Management there might still choose to burden you with responsibility even if their own CEO declared you a saint and lifetime customer of honor. But you might never get to that bridge. For now, get proof, and use what points you know are yours anyway.

616. If I want to take cash from Portugal to the USA, should I exchange my money before leaving or after arriving?
I would just rely on the salary from my job in the US. If you don't have a job in the US, you're very unlikely to get a visa to move there and look for work, and so the question of how to take money there (except for a holiday) doesn't arise. (Unless you have dual Portuguese/American citizenship.)
