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5650Monte Carlo Standard Error 5A Monte Carlo run has sample mean terminal payoff 9.8 and sample standard deviation 5 from n=1024 paths. With rate 0.025 and maturity 1.25, what are the time-0 price estimate, its standard error, and the approximate 95% confidence interval?数理金融中等数值题未尝试面试订阅5654Asian Path Payoff 4A simulated path for an arithmetic-average Asian call is [95, 92, 90, 97] with strike 94. What payoff does this single path contribute to the Monte Carlo estimator?数理金融中等数值题未尝试面试订阅5656Required Path Count 1A pricing engine estimates that the discounted payoff standard deviation is about 6. How many Monte Carlo paths are needed to drive the standard error down to at most 0.15?数理金融中等数值题未尝试面试订阅5657Required Path Count 2A pricing engine estimates that the discounted payoff standard deviation is about 3.5. How many Monte Carlo paths are needed to drive the standard error down to at most 0.08?数理金融中等数值题未尝试面试订阅5661Why Monte Carlo Fits Path DependenceWhy is Monte Carlo often a natural choice for pricing path-dependent derivatives?数理金融中等essay未尝试面试订阅5662Why Monte Carlo Converges SlowlyWhy do practitioners say plain Monte Carlo converges slowly even though it is conceptually simple?数理金融中等essay未尝试面试订阅5663Why Discounting Still Matters In SimulationWhy is it incorrect to average terminal payoffs from a risk-neutral simulation and stop there without discounting?数理金融中等essay未尝试面试订阅5664Why Monte Carlo Beats Trees In High DimensionWhy can Monte Carlo become more attractive than lattice methods as the number of risk factors grows?数理金融中等essay未尝试面试订阅5665Why Monte Carlo And Model Risk InteractWhy does a small Monte Carlo standard error not guarantee that the option price is actually reliable?数理金融中等essay未尝试面试订阅5861Risk-Neutral Probability From A Quoted CallIn a one-period binomial model the stock has S0=100 and goes to Su=130 or Sd=90, with risk-free rate 0. A call struck at K=100 trades at price 12. Back out the implied risk-neutral probability of the up state from this option quote.数理金融简单数值题未尝试面试订阅5862Arrow-Debreu Prices From Option QuotesA stock has three future states with prices 120, 100, and 80; the risk-free rate is 0. Calls struck at 80 trade at 28 and calls struck at 100 trade at 8. Using the digital/butterfly decomposition, find the Arrow-Debreu price of the single highest state (the state where the stock ends at 120).数理金融困难数值题未尝试面试订阅5863Spot The Arbitrage In A Price SetIn a one-period two-state world (states U and D) with risk-free rate 0, asset A pays 2,1 and trades at 1.4, asset B pays 1,3 and trades at 1.7. A bond paying 1,1 trades at 1. Do these three prices admit a strictly positive state-price vector, or is there an arbitrage? Report the state prices if they exist, otherwise state 'arbitrage'.数理金融中等数值题未尝试面试订阅5864Cheapest Dominating Portfolio CostCalls with strikes 80 and 100 trade at 22 and 8. You want a static portfolio of these two calls whose payoff dominates that of a strike-90 call in every terminal state. What is the minimum cost of such a dominating (super-replicating) portfolio?数理金融简单数值题未尝试面试订阅5865Digital Upper Bound from Call SpreadA cash-or-nothing digital call pays 1 if S T > 100 and 0 otherwise. Calls with strikes 95 and 100 trade at 9 and 6. Using a static call-spread super-hedge, what is the tightest model-free upper bound on the digital's price?数理金融中等数值题未尝试面试订阅5866Digital Lower Bound from Call SpreadA cash-or-nothing digital call pays 1 if S T > 100 and 0 otherwise. Calls with strikes 100 and 105 trade at 6 and 4. Using a static call-spread sub-hedge, what is the strongest model-free lower bound on the digital's price?数理金融中等数值题未尝试面试订阅5867Daily Break-Even Move From Implied VolA stock trades at 80 with 32% annualized implied volatility. To roughly the nearest cent, what one-day one-sigma move (in price points) does that implied volatility price in, using 252 trading days?数理金融简单数值题未尝试免费5868Theta Versus Gamma On A Hedged DayYou are long a delta-hedged option with gamma 0.04 on a stock at 100, priced at 20% implied vol. Over one trading day (1/252 year) the stock moves 1.5 points. Using gamma P&L = 0.5·gamma·(dS) 2 and theta P&L = -0.5·gamma·S 2·sigma impl 2·dt, what is the net P&L for the day, to four decimals?数理金融中等数值题未尝试免费5869Hedged P&L From The Variance GapApproximate the total P&L of a long delta-hedged option by 0.5·gamma·S 2·(sigma real 2 - sigma impl 2)·T. With gamma 0.05, S = 50, realized vol 0.30, implied vol 0.22, and T = 20/252 years, what is the approximate P&L, to four decimals?数理金融困难数值题未尝试面试订阅5870How Many Daily Moves To Break EvenA stock at 100 has 25% annualized implied vol, so its one-day one-sigma move is about 1.5749 points. An at-the-money straddle costs 5 points. Treating break-even as the cumulative absolute move equalling the premium, how many one-day one-sigma moves does the premium correspond to, to four decimals?数理金融中等数值题未尝试免费5871Vega P&L From A Vol RepricingYour position has total vega of 20 dollars per one full volatility point (i.e. per 1.00 change in sigma). Overnight the implied vol used to mark the book rises from 22% to 27% with spot unchanged. Ignoring all other Greeks, what is the mark-to-market vega P&L in dollars, to two decimals?数理金融简单数值题未尝试免费