What do you think would happen to a broad-based stock price index such as the S&P 500 under each situation?

• The Federal Reserve Bank announces an interest-rate cut
• The federal government announces a capital gains tax increase
• Stringent new regulations on the coupling of computer software and sales of new computers are announced
• Oil prices skyrocket
Say what will happen and explain why

Up,
slightly down (but bonds rise),
S&P unchanged but NASDAQ slightly down,
Down.