Not illegal insider trading. If informed people within an industry have knowledge of impending major moves, they can trade because that news was public, just not public enough for retail.
Remember too, for news to make the public news, at the time, media may not have considered it enough of importance to put it to print early enough.
Then how come that news that the market misspriced causes at times assets to move for many hours or days in favor of the newly found momentum. Unexpected news that translate into a shift of fundamentals can cause hours if not days of revaluation. None of that is baked into the current price. So I beg to strongly disagree. Whether it's priced in or not is a function of whether the news is in line with expectations or not.
TAL felt 70% on friday. If im correct, in the western media, news about CCP intervention showed up on saturday. So much of the news.
"But they have hints of "something is about to happen" and i fell for those also few times." Suggest that you look up and use in your trading the definitions for the words News and Rumor. News reports on events that have happened e.g. past tense regardless of how fast you get the news, it's done. Your fret centers around the rumor of an event about to happen that you fell for. Whose fault is that? If you are misled by accurate news, again whose fault is that?
News and cable stations like CNBC and Bloomberg are not there to help the retail traders. They are there to make sure the legions of retail traders continue to be fed misinformation to benefit the big boys (hedge funds, mutual funds, banks and brokers). Who provides the huge revenues to CNBC and Bloomberg? Anyone with half a brain would know that the hedge funds with their connections to top CEOs not counting their army of research analysts knows so much more than the retail trader can hope during his entire lifetime on the companies that the big boys want to trade. If you are one of those retail traders dumb enough to believe you can profit from the news, you are better off gambling in Las Vegas. You will atleast, get free rooms and free buffet meals from the Las Vegas casinos for your losses. Losing your monies needlessly by relying on the news on Wall Street, you just lost your monies without a clue what the hell happened. And not even a comped meal and free rooms for you.
Did you consider the market has been shits lately? Positive news isn't gonna prevent a selloff if SPY is falling 10 points almost everyday for the past 2 weeks.