Such an independent, or "undecidable" (that is, neither provable nor refutable in F) statement GF in F is often called "the Gödel sentence" of F. In fact, in favourable circumstances, it can be shown that GF is true, provided that F is indeed consistent.
Markets have soared and plummeted in response to small changes in Fed statements perceived as affecting the likelihood that liftoff is imminent.
Added to that was the Fed statement, keenly watched for signs of when US interest rates may start rising.
Paul Ashworth, chief US economist at Capital Economics, said the Fed statement, while mixed, was notably more positive than the last one.
Of course, it's down to the Fed statement; perhaps a 1 percentage point rise in yields is the market's best guess at the damping effect of QE on government borrowing costs.
An unexpected hike in interest rates by the Federal Reserve might explain a dual shift, but the last Fed statement hardly suggested the America's central bank was in a hurry.The alternative explanations get quite convoluted, but fairly represent the complex world in which financial traders use a combination of leverage, hedges and diversified positions.
The information, contained in the annual 20-F statement that non- U.S. companies file with the SEC, is interesting but not nearly as detailed nor useful as the information U.S. companies must disclose in their proxy statements.
Market sentiment has turned decidedly negative since the Fed statement on Wednesday.
RSF's statement said: "This is at least the third time a woman reporter has been sexually assaulted since the start of the Egyptian revolution.
She has not been dissenting in Fed policy statements; on the contrary, she helped make the Fed's current policy a reality.
