Stock price 1-30 Laddered Treasury Powershares (PLW) today

An amount of funds at a trading account calculated from all the closed positions, and deposit/withdrawal operations. Open positions do not count in the balance calculation, that's why balance = equity, if there are no open positions. 

Nowadays, a lot of people still confuse financial investments with their accumulation or saving. And this despite the characteristics, have critical differences between these concepts. You can save money and save it somewhere for a "rainy day." In the bank, under the mattress, it does not matter where, because one day inflation will do its job, and this money will lose its original value or completely depreciate. Investments allow not only not to lose money, but also to also make money.

Major participants of the OTC market who ensure its liquidity. Can act as both sellers and buyers.