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Stock Market

equity finance - raising funds through stocks/shares  

  • debt finance - raising funds through bonds/loans
  • dividends - paid from firm's profits to stockholders
    • bonds pay predetermined amounts
    • profits increase >> dividends increase
  • stock markets represented nominally >> real value could decrease even as nominal value increases

stock price - equal to present value of future expected dividends  

  • $Qt = $Dt+1 / (1+it) + $Dt+2 / [(1+it)(1+it+1)] + ...
    • same relationship when converted to real value and real interest rates
  • higher expected future dividends >> higher real stock price
  • higher current/expected real interest rates >> lower real stock price
  • expecting high stock price later >> high current stock price
    • random walk - w/ each step equally likely, mov'ts unpredictable
    • major mov'ts really can't be predicted
  • predictions based on expected policy/social/gov't shifts

effect of monetary expansion on stock market  

  • money increase >> LM curve shifts down >> equilibrium output increases, interest decreases (both briefly)
  • stock market already anticipates move >> no effect on stock market
  • stock market doesn't anticipate move >> stock prices increase
    • expansion lowers interest rate and increases output (dividends)

effect of increased consumer spending on stock market  

  • sending increase >> IS curve shifts right >> output increases, interest increases (both in short term)
  • output increase >> higher stock prices
    • interest increase >> lower stock prices
  • final, net outcome depends on LM slope
    • flatter LM curve >> output increase dominates >> higher stock prices
    • steeper LM curve >> interest increase dominates >> lower stock prices
  • monetary reaction - Fed may choose to accomodate IS shift
    • Fed accomodates shift >> increases money supply to keep interest rates from increasing >> stock prices rise for sure
    • Fed chooses to do nothing >> stock prices may increase or decrease
    • Fed counteracts inflation >> monetary contraction >> output stays constant, interest rises >> stock prices drop for sure

fundamental value - present value of expected dividends  

  • actual stock prices not equal to fundamental value >> sometimes underpriced or overpriced
  • stock prices can increase as long as investors expect stock prices to increase
  • rational speculative bubbles - growth of stock prices based on speculation
    • prices above fundamental value (even if fundamental value is 0)
    • investors expect to be able to sell stock at a higher value in a following year
  • fads - deviations from fundamental value due to past success
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