Yield Curve Arbitrage
Does a steepening yield curve help bank profits? It depends on whether a bank has already bought long bonds before the steepening curve makes them cheaper. If the banks already own those bonds, then the more the curve steepens, the more it inflicts losses and then the banks have to sell, which steepens the curve further.
Treasury Yield / Stock Dividend
Does it really make sense to compress the spread between the Treasury bond yield and the dividend yield on stocks? Not if stocks can go down.