Ford is one of the most popular stocks on the exchange to trade, meaning it's a favorite for short sellers. That's why it's not strange to see its ticker swing by as much as 30 cents in a day. True investors who read the news and keep up with this company are not going to pile in until earnings are reported (or just before) as they look to add F to portfolios and hedge funds with the idea that yet another positive quarter will make it jump.
Until then, you are at the mercy of the short sellers who love the fact it swings so much, could care less what the company actually does, and are just there to "pump and dump."
If you are an investor, your only advantage is time. You've just got to wait it out. I expect the stock to go north sometime in October.