Select all that apply Which of these statements is (are) correct in relation to the three theories explaining the shape of the yield curve? Select all that apply. Multiple select question. There is no formula that explains the market segmentation theory. Of the three theories, the market segmentation theory is the least-focused on market risk. The market segmentation theory is an extension of the unbiased expectations theory. The yield curve can be upward-sloping, flat, or downward-sloping according to all three theories