> Either the price is higher than your bid, and your order won't fill (so why place it?) or the price is lower than your bid, and you should expect the market knows something you don't.
There is no risk-free way to trade. You can place a market order and guarantee execution, bearing the risk that you get a bad price. You can place a limit order, and guarantee price, bearing the risk that your trade doesn’t execute.
It sounds like you’re starting with the assumption that you don’t know whether the options are undervalued or overvalued, and if you start with that assumption, yes, the correct answer is don’t buy or sell the option (barring some other reason to buy or sell). Duh. But the reason the market “knows something you don’t” is because it’s full of people doing research. Sometimes, the person doing the research is you, and you have an idea of where the price will go. That’s what an edge is. When you have an edge, you can make money, but maybe not very much and not very reliably.
Where it gets ridiculous is when people speculate with SPY options or dumb shit like that. The reason why speculating with SPY is so ridiculous is because it’s just so unlikely that you could get an edge with SPY. But in general? Yes, it’s possible to get an edge.
Trades always execute at exactly the market price. A limit order says that if the market price reaches your limit price, execute the trade. At that moment, your limit price will equal the market price.
That is technically correct but uninformative. If there’s a point you’re making, I can’t figure it out.
You earlier said that there’s no point in bidding anything but “current market price”, and that’s what I was responding to. Limit orders can execute at current market price but they can also execute at some future market price. It’s ok to place limit orders, they just have different risks from market orders.
There is no risk-free way to trade. You can place a market order and guarantee execution, bearing the risk that you get a bad price. You can place a limit order, and guarantee price, bearing the risk that your trade doesn’t execute.
It sounds like you’re starting with the assumption that you don’t know whether the options are undervalued or overvalued, and if you start with that assumption, yes, the correct answer is don’t buy or sell the option (barring some other reason to buy or sell). Duh. But the reason the market “knows something you don’t” is because it’s full of people doing research. Sometimes, the person doing the research is you, and you have an idea of where the price will go. That’s what an edge is. When you have an edge, you can make money, but maybe not very much and not very reliably.
Where it gets ridiculous is when people speculate with SPY options or dumb shit like that. The reason why speculating with SPY is so ridiculous is because it’s just so unlikely that you could get an edge with SPY. But in general? Yes, it’s possible to get an edge.