Can I pay into a Stocks & Shares LISA as well as a regular S&S ISA?
Yes, this is fine: You can save up to £20,000 in one type of account or split the   allowance across some or all of the other types. You can only pay £4,000 into your Lifetime ISA in a tax year ... Example   You could save £11,000 in a cash ISA, £2,000 in a stocks and shares ISA, £3,000 in an innovative finance ISA and £4,000 in a   Lifetime ISA in one tax year. https://www.gov.uk/individual-savings-accounts/how-isas-work You might want to consider whether it is wise to be fully invested in shares. If you're going to have to dip into them for things like holidays and a car, you're taking a risk that you might have to sell when the market is low. As a basic rate taxpayer, you have a £1 000 personal savings allowance. You don't need to chase the tax break with a cash ISA, which often have poor rates. However, you should consider keeping some of your savings in cash, for example in a current account that pays decent interest on the balance.
"My gut is to say that any time there seems to be easy money to be made, the opportunity would fade as everyone jumped on it. Let me ask you - why do you think these stocks are priced to yield 7-9%? The DVY yields 3.41% as of Aug 30,'12.  The high yielding stocks you discovered may very well be hidden gems. Or they may need to reduce their dividends and subsequently drop in price.  No, it's not 'safe.' If the stocks you choose drop by 20%, you'd lose 40% of your money, if you made the purchase on 50% margin. There's risk with any stock purchase, one can claim no stock is safe. Either way, your proposal juices the effect to creating twice the risk.  Edit - After the conversation with Victor, let me add these thoughts. The ""Risk-Free"" rate is generally defined to be the 1yr tbill (and of course the risk of Gov default is not zero). There's the S&P 500 index which has a beta of 1 and is generally viewed as a decent index for comparison. You propose to use margin, so your risk, if done with an S&P index is twice that of the 1X S&P investor. However, you won't buy S&P but stocks with such a high yield I question their safety. You don't mention the stocks, so I can't quantify my answer, but it's tbill, S&P, 2X S&P, then you." Index funds are well-known to give the best long-term investment. Are they? Maybe not all the time! If you had invested in an index fund tracking the S&P500 at the start of 2000 you would still be behind in terms of capital appreciation when taking inflation into considerations. Your only returns in 13.5 years would have been any dividends you may have received. See the monthly chart of the S&P500 below.  Diversification can be good for your overall returns, but diversification simply for diversification sake is as you said, a way of reducing your overall returns in order of smoothing out your equity curve. After looking up indexes for various countries the only one that had made decent returns over a 13.5 year period was the Indian BSE 30 index, almost 400% over 13.5 years, although it also has gone nowhere since the end of 2007 (5.5 years). See monthly chart below.  So investing internationally (especially in developing countries when developed nations are stagnating) can improve your returns, but I would learn about the various international markets first before plunging straight in. Regarding investing in an Index fund vs direct investment in a select group of shares, I did a search on the US markets with the following criteria on the 3rd January 2000:  If the resulting top 10 from the search were bought on 3rd January 2000 and held up until the close of the market on the 19th June 2013, the results would be as per the table below:  The result, almost 250% return in 13.5 years compared to almost no return if you had invested into the whole S&P 500 Index. Note, this table lists only the top ten from the search without screening through the charts, and no risk management was applied (if risk management was applied the 4 losses of 40%+ would have been limited to a maximum of 20%, but possibly much smaller losses or even for gains, as they might have gone into positive territory before coming back down - as I have not looked at any of the charts I cannot confirm this). This is one simple example how selecting good shares can result in much better returns than investing into a whole Index, as you are not pulled down by the bad stocks. "Yes this is possible in the most liquid securities, but currently it would take several days to get filled in one contract at that amount There are also position size limits (set by the OCC and other Self Regulatory Organizations) that attempt to prevent people from cornering a market through the options market. (getting loads of contacts without effecting the price of the underlying asset, exercising those contracts and suddenly owning a huge stake of the asset and nobody saw it coming - although this is still VERY VERY possible) So for your example of an option of $1.00 per contract, then the position size limits would have prevented 100 million of those being opened (by one person/account that is). Realistically, you would spread out your orders amongst several options strike prices and expiration dates. Stock Indexes are some very liquid examples, so for the Standard & Poors you can open options contracts on the SPY ETF, as well as the S&P 500 futures, as well as many other S&P 500 products that only trade options and do not have the ability to be traded as the underlying shares. And there is also the saying ""liquidity begets liquidity"", meaning that because you are making the market more liquid, other large market participants will also see the liquidity and want to participate, where they previously thought it was too illiquid and impossible to close a large position quickly" S & P Index Announcements would have notes on when there are changes to the index.  For example in the S & P Small-cap 600 there is a change that takes affect on Feb. 19, 2013. As for how index funds handle changes to the fund, this depends a bit on the nature of the fund as open-end mutual funds would be different than exchange-traded funds.  The open-end fund would have to sell and purchase to keep tracking the index which can be interesting to see how well this is handled to keep the transaction costs down while the ETFs will just unload the shares in the redemption units of the stock leaving the index while taking in new shares with creation units of the newly added stock to the index. A Junior ISA might be one option if you are eligible do you have a CTF? (child trust fund) though the rules are changing shortly to allow those with CTF's to move to a junior ISA. JISA are yielding about 3.5% at the moment  Or as you are so young you could invest in one or two of the big Generalist Investment trusts (Wittan, Lowland) - you might need an adult open this and it would be held via a trust for you.  Or thinking really far ahead you could start a pension with say 50% of the lumpsum I'd put as much of it as possible into an ISA that pays a decent amount of interest so you get the benefit of the money accruing interest tax free. For the rest, I'd shop around for notice accounts, but would also keep an eye out for no-notice accounts. The latter might be beneficial if you expect interest rates to rise and are willing to shop around and move the money into accounts paying better interest every few months. Just make sure you're also factoring in the loss of interest when moving the money. You could look into fixed term savings bonds but I don't think they currently pay enough to make it worthwhile locking away your money. "One possibility you may consider is to keep all of your funds in the stocks and shares ISA while investing that proportion you wish to keep in cash into a tradeable ""Money Market"" ETF. A Money Market ETF will give you rates comparable to interest rates on cash and at the same time it will give you ""instant access"" subject to normal 3 day settlement of equities.   This is not exactly a perfect solution.  Most Money Market ETFs will pay monthly dividends, so depending on your timing, you may have to give up some interest.  In the worst case, if you were to sell the day before going ex-dividend, then you would be giving up a months interest.  In the best case,  if you were to sell on the day of going ex-dividend, you would be giving up no interest." I'm surprised no one has picked up on this, but the student loan is an exception to the rule. It's inflation bound (for now), you only have to pay it back as a percentage of your salary if you earn over £15k (11% on any amount over that I believe), you don't have to pay it if you lose your job, and it doesn't affect your ability to get credit (except that your repayments will be taken into account).   My advice, which is slightly different to the above, is: if you have any shares that have lost more than 10% since you bought them and aren't currently recovering, sell them and pay off your debts with those. The rest is down to you - are they making more than 10% a year? If they are, don't sell them. If your dividends are covering your payments, carry on as you are. Otherwise it's down to you.